Fuel Delivery

Gold ChapterATLAS-FUELDELI-0949Template 2.2

P2145

Exhaust Gas Recirculation Vent Control Circuit High

P2145 — Exhaust Gas Recirculation Vent Control Circuit High — covers Exhaust Gas Recirculation Control.\n\nThe ECM evaluates EGR throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, EGR operating state, airflow/pressure response, and prerequisite engine conditions. The exact fault is that…

SeverityMedium to high
DriveabilityThe vehicle may remain driveable, but EGR control can be disabled and emissions, combustion temperature, smoke, or driveability may worsen. Repair before emissions testing; limit driving if severe hesitation, stalling, or abnormal exhaust behavior develops.
Diagnostic Time1.0-2.5 hours
Typical Cost$100-$2,000+ depending on proven cause and vehicle
Atlas StatusGold Chapter
Reviewed2026-08

Diagnostic Snapshot

Most Common Cause: open/short/high-resistance EGR throttle or vent control wiringEngine Damage Risk: Low direct engine-damage risk from the circuit code itself, but uncontrolled EGR can worsen combustion and emissions.Safe to Drive: The vehicle may remain driveable, but EGR control can be disabled and emissions, combustion temperature, smoke, or driveability may worsen. Repair before emissions testing; limit driving if severe hesitation, stalling, or abnormal exhaust behavior develops.Professional Scan Tool: Strongly recommended; enhanced PIDs and bidirectional controls materially improve diagnosisMechanical Test Recommended: Yes — confirm physical pedal/throttle, EGR, or cylinder/injector response when electrical data indicates the circuit is capable of operatingDIY Difficulty: Advanced DIY / Professional preferred

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Learn the System

Before diagnosing this code, it helps to understand the system behind it.

Read Understanding Fuel Delivery Systems

Technical Summary

P2145 — Exhaust Gas Recirculation Vent Control Circuit High — is a Exhaust Gas Recirculation Control DTC. The ecm detects the egr vent control circuit above its calibrated electrical expectation.

The ECM monitors EGR throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, EGR operating state, airflow/pressure response, and prerequisite engine conditions. This distinction matters because an electrical low/high/open code requires circuit proof, a correlation code requires comparison of named redundant channels, and an injector-group supply code requires loaded testing of the shared feed and its branches.

First diagnostic move: inspect the EGR throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical EGR-system reaction.

Preserve freeze-frame because key-on, idle, load, heat, vibration, EGR command, or injector-load conditions can change the diagnostic direction.

Do not invent universal voltage/current/resistance thresholds. OEM circuit topology and calibrated limits take priority.

Driveability: The vehicle may remain driveable, but EGR control can be disabled and emissions, combustion temperature, smoke, or driveability may worsen. Repair before emissions testing; limit driving if severe hesitation, stalling, or abnormal exhaust behavior develops.

What You'll Learn

  • Exact meaning of P2145
  • Monitor logic and enabling conditions
  • Ranked likely causes
  • Freeze-frame clues
  • Live-data patterns
  • Loaded circuit tests
  • Before-you-condemn checks
  • Repair verification

Think Like a Technician

Treat P2145 as a monitor statement: EGR throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, EGR operating state, airflow/pressure response, and prerequisite engine conditions. Do not start with a parts list. Preserve the complete scan, identify shared circuits and companion codes, reproduce the failure, then separate electrical capability from data plausibility and physical response. The first layer that fails a controlled test is the correct diagnostic branch.

What This Code Means

P2145 is defined as Exhaust Gas Recirculation Vent Control Circuit High.

In practical terms, the ECM detects the EGR vent control circuit above its calibrated electrical expectation.

The controller evaluates EGR throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, EGR operating state, airflow/pressure response, and prerequisite engine conditions.

The code identifies a failed monitored relationship, not an automatically failed part. Confirm the physical component assignment and circuit architecture by VIN before testing.

System Overview

Exhaust Gas Recirculation Control relies on the ECM comparing electrical command/input with redundant feedback and physical response. The controller must be able to trust signal integrity and loaded circuit behavior before it can safely manage torque, EGR flow, or fuel injection. A DTC can therefore identify a sensor circuit, a correlation failure, an actuator-driver circuit, or a shared injector supply without proving the named component itself has failed.

Why This Code Sets

The P2145 monitor becomes eligible after manufacturer-defined battery voltage, key/engine state, temperature, plausibility, and system prerequisites are satisfied.

It evaluates EGR throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, EGR operating state, airflow/pressure response, and prerequisite engine conditions.

The DTC stores when the ECM detects the EGR vent control circuit above its calibrated electrical expectation for the required sample count or duration. Exact voltage, current, timer, and correlation thresholds are calibration-specific and must come from service information.

Common Symptoms

  • Check Engine Light
  • EGR/emissions warning possible
  • Hesitation or rough running possible
  • Emissions-test failure possible
  • Reduced power possible

Most Likely Causes

  • 1. open/short/high-resistance EGR throttle or vent control wiring
  • 2. EGR throttle/vent actuator or solenoid electrical fault
  • 3. connector corrosion, heat damage, poor terminal fit, or water intrusion
  • 4. power/ground or shared feed problem
  • 5. sticking EGR throttle/vent mechanism causing abnormal driver response
  • 6. ECM driver fault after circuit and load are proven

Common Vehicles

This is a standardized generic OBD-II DTC used on applications that implement the relevant electronic-throttle, EGR, or injector-supply monitor. Not every vehicle supports every code. Confirm the definition, component/channel assignment, and diagnostic procedure by VIN.

Freeze Frame Clues

  • Battery/system voltage
  • Engine RPM
  • Vehicle speed
  • Calculated load
  • Coolant temperature
  • Commanded and actual throttle where relevant
  • APP/TPS channels where relevant
  • EGR command/feedback where relevant
  • Injector supply/command and misfire data where relevant
  • Companion DTCs
  • Monitor/fail-safe state

Live Data Expectations

Graph EGR throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, EGR operating state, airflow/pressure response, and prerequisite engine conditions with RPM, load, battery voltage, temperature, and related companion PIDs. Look for the first dropout, fixed value, implausible correlation, supply collapse, command-without-response, or physical response that disagrees with the electrical data. Recreate freeze-frame safely. Exact normal values are application-specific.

Typical Verification Tests

  • Confirm P2145 absent from current and pending memory
  • Repeat original freeze-frame condition
  • Load-test repaired circuit under operating current
  • Graph related signals/commands for stable response
  • Use bidirectional control where supported
  • Verify physical component/system response
  • Complete required relearn or service reset
  • Road-test and verify normal driveability/readiness

Before You Condemn

  • Confirm exact VIN-specific definition and component/group assignment
  • Save full scan and freeze-frame
  • Verify battery/charging voltage
  • Load-test module/component powers and grounds
  • Inspect terminal tension and harness routing
  • Check shared references/feeds/grounds
  • Graph related signals together
  • Perform dynamic circuit testing
  • Verify physical response
  • Check calibration/bulletins before ECM replacement

Before Replacing Parts

Confirm Exhaust Gas Recirculation Vent Control Circuit High. Save freeze-frame/full scan. Inspect the egr throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical egr-system reaction. Prove system voltage, powers/grounds, shared circuits, connector terminal fit, and physical response before replacement.

Diagnostic Workflow

  1. Confirm P2145; save current, pending, history, freeze-frame, readiness status, and the complete module scan before clearing codes.
  2. Verify the exact definition — Exhaust Gas Recirculation Vent Control Circuit High — and identify the named sensor channel, EGR circuit, or injector group using VIN-specific service information.
  3. Review the wiring diagram, connector views, component/group assignment, enabling criteria, fail-safe strategy, bulletins, calibration notes, and OEM test procedure for Exhaust Gas Recirculation Control.
  4. Verify battery condition, charging voltage, ECM powers, ignition feeds, engine/module grounds, and any shared fuse/relay feeds under load.
  5. Perform the first targeted check: inspect the EGR throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical EGR-system reaction.
  6. Inspect connectors and harnesses for spread or backed-out terminals, corrosion, water intrusion, heat damage, chafing, pin push-out, aftermarket splices, and recent repair disturbance.
  7. Graph the monitored relationship: EGR throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, EGR operating state, airflow/pressure response, and prerequisite engine conditions.
  8. Reproduce the freeze-frame condition safely and note whether the fault occurs at key-on, idle, pedal/throttle sweep, EGR command, injector load, acceleration, heat soak, or vibration.
  9. Perform loaded voltage-drop testing on power and ground paths. Continuity alone does not prove a circuit can carry actuator or injector current.
  10. Test signal/control circuits dynamically with a meter, oscilloscope, approved test load, or current clamp as appropriate to the circuit design.
  11. For EGR faults, separate electrical control failure from a mechanically stuck or restricted EGR path.
  12. Use bidirectional controls where supported and safe. Compare commanded state with electrical feedback and the expected physical response.
  13. Check shared references, grounds, feeds, relays, and companion branches because one failed load can disturb several sensors, actuators, or injectors.
  14. Validate mechanical and prerequisite conditions before condemning electronics: free throttle/pedal movement, EGR passage/valve response, or fuel/injector/cylinder operation as applicable.
  15. Before condemning the ECM, prove powers/grounds, terminal tension, external loads, circuit load capability, network health where relevant, and current software/calibration.
  16. Repair only the fault supported by testing, complete required relearns/service procedures, repeat the original enable condition, and verify P2145 stays absent from current and pending memory.

Labor & Inspection Checklist

  • Full scan/freeze-frame saved
  • VIN-specific wiring reviewed
  • Battery/module voltage verified
  • Connectors/terminals inspected
  • Harness/shared circuits checked
  • Live-data graph captured
  • Loaded voltage-drop/current test completed
  • Physical response checked
  • Relearn/service procedure completed
  • Pending-code and verification drive completed

Common Repairs

  • Repair EGR control wiring/connector
  • Replace EGR throttle/vent actuator or solenoid when electrically proven faulty
  • Repair power/ground/shared feed
  • Clean/repair mechanical EGR restriction only when proven
  • Perform required relearn
  • Replace ECM only after driver failure is proven

Common Parts

  • Connector/terminal repair materials
  • System-specific sensor/actuator where proven
  • Hoses/gaskets/lines/seals where proven
  • Valve/pump/heater where proven
  • Mechanical/emissions parts only after diagnosis

Shop Notes

P2145 root-cause strategy: the exact title is Exhaust Gas Recirculation Vent Control Circuit High. Treat the title as the monitor boundary, not as a command to replace the named component.

Monitor logic: the ECM evaluates EGR throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, EGR operating state, airflow/pressure response, and prerequisite engine conditions. Recreate the freeze-frame condition because a key-on self-test fault has a different diagnostic direction from a heat-, load-, vibration-, or command-dependent failure.

First-line proof: inspect the EGR throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical EGR-system reaction. Capture the failure before disconnecting components whenever possible; unplugging can temporarily restore a poor terminal or erase an intermittent relationship.

Loaded-circuit rule: low-current sensor circuits require reference/ground/signal plausibility checks, while EGR actuators and injector supplies require load-capable voltage-drop/current testing. Match the test to the circuit.

Shared-circuit rule: use the wiring diagram to identify common references, grounds, fuses, relays, splices, and power stages. A single shorted branch can create several apparently unrelated DTCs.

Controller rule: ECM replacement is a last step. Prove stable module voltage, grounds, connector terminal tension, external loads, signal/control circuits, and calibration before condemning a driver or input stage.

Verification rule: after repairing P2145, repeat the original operating state and watch the monitored relationship live. A cleared MIL is not enough; pending memory must remain clear and the affected monitor/system must operate normally.

EGR control diagnosis: a circuit low/high/open code is electrical first. Carbon restriction or sticking may contribute to abnormal actuator behavior, but it does not replace circuit testing.

After electrical repair, verify commanded EGR operation produces the expected airflow/pressure/combustion response. This confirms the system works mechanically as well as electrically.

P2145 diagnostic note 1: Egr throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, egr operating state, airflow/pressure response, and prerequisite engine conditions. During diagnosis, compare the captured operating state with the circuit's loaded behavior and the related physical response. Use the VIN-specific wiring diagram and service procedure to decide whether the next test belongs at the sensor/actuator, shared feed/reference, harness, mechanical system, or controller. For this code, inspect the EGR throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical EGR-system reaction. Avoid replacing a component unless the failure is reproduced or the circuit/component fails a documented test.

P2145 diagnostic note 2: Egr throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, egr operating state, airflow/pressure response, and prerequisite engine conditions. During diagnosis, compare the captured operating state with the circuit's loaded behavior and the related physical response. Use the VIN-specific wiring diagram and service procedure to decide whether the next test belongs at the sensor/actuator, shared feed/reference, harness, mechanical system, or controller. For this code, inspect the EGR throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical EGR-system reaction. Avoid replacing a component unless the failure is reproduced or the circuit/component fails a documented test.

P2145 diagnostic note 3: Egr throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, egr operating state, airflow/pressure response, and prerequisite engine conditions. During diagnosis, compare the captured operating state with the circuit's loaded behavior and the related physical response. Use the VIN-specific wiring diagram and service procedure to decide whether the next test belongs at the sensor/actuator, shared feed/reference, harness, mechanical system, or controller. For this code, inspect the EGR throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical EGR-system reaction. Avoid replacing a component unless the failure is reproduced or the circuit/component fails a documented test.

P2145 diagnostic note 4: Egr throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, egr operating state, airflow/pressure response, and prerequisite engine conditions. During diagnosis, compare the captured operating state with the circuit's loaded behavior and the related physical response. Use the VIN-specific wiring diagram and service procedure to decide whether the next test belongs at the sensor/actuator, shared feed/reference, harness, mechanical system, or controller. For this code, inspect the EGR throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical EGR-system reaction. Avoid replacing a component unless the failure is reproduced or the circuit/component fails a documented test.

P2145 diagnostic note 5: Egr throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, egr operating state, airflow/pressure response, and prerequisite engine conditions. During diagnosis, compare the captured operating state with the circuit's loaded behavior and the related physical response. Use the VIN-specific wiring diagram and service procedure to decide whether the next test belongs at the sensor/actuator, shared feed/reference, harness, mechanical system, or controller. For this code, inspect the EGR throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical EGR-system reaction. Avoid replacing a component unless the failure is reproduced or the circuit/component fails a documented test.

P2145 diagnostic note 6: Egr throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, egr operating state, airflow/pressure response, and prerequisite engine conditions. During diagnosis, compare the captured operating state with the circuit's loaded behavior and the related physical response. Use the VIN-specific wiring diagram and service procedure to decide whether the next test belongs at the sensor/actuator, shared feed/reference, harness, mechanical system, or controller. For this code, inspect the EGR throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical EGR-system reaction. Avoid replacing a component unless the failure is reproduced or the circuit/component fails a documented test.

P2145 diagnostic note 7: Egr throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, egr operating state, airflow/pressure response, and prerequisite engine conditions. During diagnosis, compare the captured operating state with the circuit's loaded behavior and the related physical response. Use the VIN-specific wiring diagram and service procedure to decide whether the next test belongs at the sensor/actuator, shared feed/reference, harness, mechanical system, or controller. For this code, inspect the EGR throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical EGR-system reaction. Avoid replacing a component unless the failure is reproduced or the circuit/component fails a documented test.

P2145 diagnostic note 8: Egr throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, egr operating state, airflow/pressure response, and prerequisite engine conditions. During diagnosis, compare the captured operating state with the circuit's loaded behavior and the related physical response. Use the VIN-specific wiring diagram and service procedure to decide whether the next test belongs at the sensor/actuator, shared feed/reference, harness, mechanical system, or controller. For this code, inspect the EGR throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical EGR-system reaction. Avoid replacing a component unless the failure is reproduced or the circuit/component fails a documented test.

P2145 diagnostic note 9: Egr throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, egr operating state, airflow/pressure response, and prerequisite engine conditions. During diagnosis, compare the captured operating state with the circuit's loaded behavior and the related physical response. Use the VIN-specific wiring diagram and service procedure to decide whether the next test belongs at the sensor/actuator, shared feed/reference, harness, mechanical system, or controller. For this code, inspect the EGR throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical EGR-system reaction. Avoid replacing a component unless the failure is reproduced or the circuit/component fails a documented test.

P2145 diagnostic note 10: Egr throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, egr operating state, airflow/pressure response, and prerequisite engine conditions. During diagnosis, compare the captured operating state with the circuit's loaded behavior and the related physical response. Use the VIN-specific wiring diagram and service procedure to decide whether the next test belongs at the sensor/actuator, shared feed/reference, harness, mechanical system, or controller. For this code, inspect the EGR throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical EGR-system reaction. Avoid replacing a component unless the failure is reproduced or the circuit/component fails a documented test.

P2145 diagnostic note 11: Egr throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, egr operating state, airflow/pressure response, and prerequisite engine conditions. During diagnosis, compare the captured operating state with the circuit's loaded behavior and the related physical response. Use the VIN-specific wiring diagram and service procedure to decide whether the next test belongs at the sensor/actuator, shared feed/reference, harness, mechanical system, or controller. For this code, inspect the EGR throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical EGR-system reaction. Avoid replacing a component unless the failure is reproduced or the circuit/component fails a documented test.

P2145 diagnostic note 12: Egr throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, egr operating state, airflow/pressure response, and prerequisite engine conditions. During diagnosis, compare the captured operating state with the circuit's loaded behavior and the related physical response. Use the VIN-specific wiring diagram and service procedure to decide whether the next test belongs at the sensor/actuator, shared feed/reference, harness, mechanical system, or controller. For this code, inspect the EGR throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical EGR-system reaction. Avoid replacing a component unless the failure is reproduced or the circuit/component fails a documented test.

Technician Notes

Exact definition: Exhaust Gas Recirculation Vent Control Circuit High.\n\nFault interpretation: the ECM detects the EGR vent control circuit above its calibrated electrical expectation.\n\nMonitor focus: EGR throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, EGR operating state, airflow/pressure response, and prerequisite engine conditions.\n\nFirst move: inspect the EGR throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical EGR-system reaction.\n\nUse OEM circuit design and thresholds; do not apply invented universal voltage, current, duty-cycle, correlation, or resistance values.

Mechanic's Tip

For P2145, follow the chain: prerequisite state → command/input → loaded circuit behavior → related feedback → physical response. The first point that stops agreeing determines the next test.

Common Mistakes

  • Replacing the named component from the code alone
  • Ignoring companion/root-cause DTCs
  • Assuming sensor channels have universal voltage slopes
  • Using continuity instead of loaded testing
  • Ignoring shared references/feeds/grounds
  • Clearing freeze-frame before diagnosis
  • Condemning the ECM before proving external loads

Tools Used During Diagnosis

  • Manufacturer-enhanced graphing scan tool
  • Digital multimeter
  • Oscilloscope
  • Current clamp where appropriate
  • Backprobe and terminal-tension tools
  • Battery/charging tester
  • VIN-specific wiring diagrams/service information
  • Bidirectional controls where supported

Manufacturer Notes

The base P2125-P2150 definitions used here are standardized OBD-II descriptions, but sensor-letter mapping, injector-group cylinder assignment, EGR actuator design, reference/ground architecture, thresholds, enabling criteria, fail-safe behavior, and relearn procedures vary by manufacturer. Confirm VIN-specific service information.

Customer Explanation

Your vehicle stored P2145, which means Exhaust Gas Recirculation Vent Control Circuit High. This does not automatically mean the named sensor, EGR component, or injector has failed. The shop needs to test the circuit, shared power/reference/ground paths, related live data, and the component's actual response to prove the cause.

Frequently Asked Questions

What does P2145 mean?

P2145 is Exhaust Gas Recirculation Vent Control Circuit High. In practical terms, the ECM detects the EGR vent control circuit above its calibrated electrical expectation.

Does P2145 prove the named sensor, EGR valve, or injector is bad?

No. The code identifies a failed electrical, correlation, or supply-voltage monitor. Wiring, connectors, shared feeds/references, grounds, another load on the same circuit, mechanical response, and the controller must be tested before parts are condemned.

Can I drive with P2145?

The vehicle may remain driveable, but EGR control can be disabled and emissions, combustion temperature, smoke, or driveability may worsen. Repair before emissions testing; limit driving if severe hesitation, stalling, or abnormal exhaust behavior develops.

What should be checked first?

Inspect the egr throttle/vent actuator connector and harness, then command the circuit with a bidirectional scan tool where supported while measuring loaded electrical response and confirming physical egr-system reaction.

Why is freeze-frame important?

It shows voltage, RPM, load, temperature, throttle/pedal position, vehicle speed, and operating state when the monitor failed. That helps distinguish key-on electrical faults from vibration, heat, load, or command-dependent failures.

What live data is most useful?

Graph EGR throttle/vent driver command, circuit voltage/current or driver feedback, valve/vent response, EGR operating state, airflow/pressure response, and prerequisite engine conditions together with battery voltage, RPM, load, and relevant companion PIDs. The useful pattern is the first signal, command, supply, or physical response that stops agreeing with the rest of the system.

Can low battery or charging voltage contribute?

Yes. Low or unstable voltage can distort sensor references, reduce actuator authority, or collapse a shared injector supply. Battery, charging system, module powers, and grounds should be proven before interpreting marginal circuit data.

When is an oscilloscope or current clamp useful?

Use them when a fault is intermittent or when static voltage/continuity tests pass. A scope can expose signal dropouts and driver behavior; a current clamp can show actuator or injector-group load without opening the circuit.

When is professional equipment justified?

A manufacturer-enhanced graphing scan tool is strongly recommended. Bidirectional controls, cylinder contribution, enhanced ETC/EGR/injector PIDs, an oscilloscope, and current measurement can prevent unnecessary parts replacement.

How is the repair verified?

Repeat the original enable condition, confirm the affected signals/supply remain stable under load, complete any required relearn, and verify P2145 does not return current or pending and normal driveability/readiness is restored.

Related Atlas Resources

Use VIN-specific OEM definitions, specifications, tests, and relearns.

Diagnostic Confidence

High when the exact monitored failure is reproduced and electrical/data/mechanical layers are separated; Medium when intermittent and not reproducible

Related Codes

P0171 P0300 P0420

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Chapter Status

Editorial StatusAtlas Certified
Last Reviewed2026-08
Template Version2.2
Related Academy GuideUnderstanding Fuel Delivery Systems

Why Trust This Guide?

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