Fuel Delivery
P0367
Camshaft Position Sensor B Circuit Low Input Bank 1
P0367 — Camshaft Position Sensor B Circuit Low Input Bank 1 — applies to Camshaft Position Sensing and identifies circuit low input. The monitored item is Camshaft Position Sensor B, Bank 1 circuit. The code wording describes the failed monitor and does…
Diagnostic Snapshot
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Learn the System
Before diagnosing this code, it helps to understand the system behind it.
Read Understanding Fuel Delivery SystemsTechnical Summary
P0367 — Camshaft Position Sensor B Circuit Low Input Bank 1 — is a Hero-tier chapter covering Camshaft Position Sensor B, Bank 1 circuit. The exact monitored fault is circuit low input.
The PCM evaluates Camshaft Position Sensor B Bank 1 signal electrical validity, waveform quality, and plausibility against crankshaft position and expected cam phase. Freeze-frame matters because the test may depend on system voltage, temperature, fuel level, run time, load, and related sensor validity.
Start with proof: Scope cmp sensor b bank 1 beside the crank signal and verify the sensor power/ground or magnetic pickup circuit from oem information. Then use the correct wiring diagram, graphing data, and an independent waveform/current, smoke/leak, or physical test.
Do not invent universal voltage, resistance, current, pressure, leak-rate, or waveform specifications. Circuit architecture and monitor thresholds vary; manufacturer service data takes priority.
Safety/driveability: Limit driving if there is hard starting, stalling, loss of synchronization, or sudden power loss. An intermittent timing-reference fault can stop the engine. Risk if ignored: Low directly, but a related mechanical timing or reluctor fault can carry significant engine-damage risk on some engines.
What You'll Learn
- Exact meaning of P0367
- Monitor/enabling-condition logic
- Freeze-frame and live-data clues
- Electrical versus physical test direction
- Repair/monitor verification
Think Like a Technician
Treat P0367 as evidence, not a parts order. The PCM is evaluating Camshaft Position Sensor B Bank 1 signal electrical validity, waveform quality, and plausibility against crankshaft position and expected cam phase.
Prove command/input first, then circuit integrity, then physical action, then feedback. The first broken link is the diagnostic target.
What This Code Means
P0367 — Camshaft Position Sensor B Circuit Low Input Bank 1 — applies to Camshaft Position Sensing and identifies circuit low input. The monitored item is Camshaft Position Sensor B, Bank 1 circuit. The code wording describes the failed monitor and does not automatically condemn the named part.
The PCM evaluates Camshaft Position Sensor B Bank 1 signal electrical validity, waveform quality, and plausibility against crankshaft position and expected cam phase. Enabling conditions vary and can depend on voltage, temperature, fuel level, engine run time, load, related-sensor validity, and whether prerequisite monitors have completed.
Start with proof: Scope cmp sensor b bank 1 beside the crank signal and verify the sensor power/ground or magnetic pickup circuit from oem information. Then use the exact circuit design plus waveform/current, smoke/leak, or physical-system testing appropriate to the fault.
System Overview
Camshaft Position Sensing provides electrical commands or feedback used by the PCM to control combustion, starting, emissions, and fuel information. Diagnose command/input, circuit integrity, physical response, and feedback as separate links.
Why This Code Sets
The monitor for P0367 runs only when the PCM has enough valid information to judge Camshaft Position Sensor B, Bank 1 circuit or the related system response.
Once enabled, the PCM evaluates Camshaft Position Sensor B Bank 1 signal electrical validity, waveform quality, and plausibility against crankshaft position and expected cam phase. P0367 is stored when the result remains outside the calibrated expectation through the required samples or test interval.
The wording—circuit low input—determines test priority. High/low/circuit faults favor electrical testing; range/performance and leak faults require proving whether the feedback is wrong or the physical system truly failed its target.
Common Symptoms
- Check Engine Light
- Possible emissions-test failure
- Hard start or no-start
- Intermittent stall
- Extended cranking
- Possible loss of power
Most Likely Causes
- 1. CMP Sensor B connector/harness fault
- 2. lost sensor feed/ground
- 3. signal open/short/high resistance
- 4. sensor internal failure
- 5. damaged/shifted reluctor
- 6. incorrect air gap/mounting
- 7. mechanical timing or VVT phase problem
- 8. PCM input fault after waveform proof
Common Vehicles
Generic OBD-II code used across many makes; exact applications, component naming, circuit strategy, EVAP architecture, sender design, and monitor thresholds vary. Verify the specific VIN.
Freeze Frame Clues
- System/cranking voltage
- RPM/load/vehicle speed
- ECT/IAT and time since start
- Fuel level and recent refueling when relevant
- Key Camshaft Position Sensing command/feedback PIDs
- Misfire or synchronization data where relevant
- Ambient/hot-soak/cold-start context
Live Data Expectations
Graph cam sync/status, desired/actual cam angle where VVT is used, engine RPM, and crank/cam correlation while scoping CMP B and CKP together. A clean waveform that is phase-shifted points toward timing/reluctor/VVT problems; an electrically missing or clipped waveform points toward the sensor/circuit.
Typical Verification Tests
- Confirm P0367 absent from current/pending memory
- Recreate freeze-frame operating condition
- Graph/scope affected signal or command
- Repeat heat/wiggle/cold-soak/refueling test if intermittent
- Perform smoke/current/flow test where appropriate
- Perform required relearn
- Complete applicable readiness monitor
- Confirm original complaint is resolved
Before You Condemn
- Confirm VIN-specific definition/component identity
- Save freeze-frame/pending/related codes
- Verify system voltage and grounds
- Inspect connector/terminal fit
- Compare scan data with waveform/current/leak/physical test
- Run OEM circuit/functional test
- Rule out mechanical/flow/sealing causes
- Document the failed test
Before Replacing Parts
Save freeze-frame and verify the exact component/system. Scope cmp sensor b bank 1 beside the crank signal and verify the sensor power/ground or magnetic pickup circuit from oem information. Replace parts only after a failed circuit, waveform/current, leak, flow, sender, or OEM functional test is documented.
Diagnostic Workflow
- Confirm P0367 and save current, pending, and history DTCs before clearing anything.
- Save freeze-frame and related codes. Record RPM/load, ECT/IAT, system voltage, fuel level, misfire data, and system-specific command/feedback PIDs.
- Verify the VIN-specific code definition, component assignment, circuit design, monitor prerequisites, and service precautions.
- Inspect Camshaft Position Sensor B, Bank 1 circuit connector/harness for corrosion, terminal tension, heat damage, fluid intrusion, chafing, and previous repairs.
- Verify battery and charging-system voltage are stable; weak voltage can distort coil, sensor, glow, EVAP, and sender diagnostics.
- Scope cmp sensor b bank 1 beside the crank signal and verify the sensor power/ground or magnetic pickup circuit from oem information.
- Identify sensor/reference technology and required supply/ground or magnetic pickup test method.
- Scope the affected signal during crank and idle; inspect amplitude, frequency/duty, missing pulses, noise, and dropout.
- Scope the related crank/cam/reference signal simultaneously to evaluate synchronization and phase.
- Test sensor power, ground, and signal circuits under operating conditions; load-test wiring where appropriate.
- Wiggle the harness near engine movement/heat points while monitoring waveform and sync status.
- Inspect sensor mounting, air gap, reluctor/tone/optical pattern, and mechanical indexing where serviceable.
- If waveform is clean but phase/reference is wrong, verify mechanical timing, VVT parked position, distributor/injection-pump indexing, or reluctor location as applicable.
- Repair the proven sensor, wiring, reluctor/reference source, or mechanical timing cause and perform required relearn.
- Verify hot/cold starting, stable synchronization, and no current/pending P0367.
Labor & Inspection Checklist
- Verify VIN/engine/service information
- Scan all modules/save freeze-frame
- Inspect component/connector/harness
- Check ignition/timing/glow/EVAP/fuel-sender basics
- Perform circuit test
- Compare live data with independent physical test
- Repair/relearn
- Complete monitor verification
Common Repairs
- Repair proven connector/wiring/power/ground fault
- Replace Camshaft Position Sensor B, Bank 1 circuit only after test failure is proven
- Correct verified ignition/timing/glow/EVAP/fuel-sender mechanical cause
- Perform required relearn or monitor procedure
- Verify no current or pending DTC
Common Parts
- Connector pigtail
- Harness repair materials
- Sensor/coil/solenoid only if proven
- Seals/hoses/sender/control parts only after diagnosis
Shop Notes
Monitor logic for P0367: verify the enabling conditions were satisfied before interpreting the DTC. Voltage, temperature, fuel level, engine state, and prerequisite sensor validity can determine whether the test runs.
Electrical proof for P0367: inspect terminal fit and test the circuit in its loaded operating state. Continuity or unplugged voltage alone can miss high resistance, a weak terminal, or a driver that fails only under current.
Physical proof for P0367: if the electrical path is credible, verify the physical result—spark energy, timing-reference integrity, glow current, valve flow/sealing, EVAP leak rate, or sender/float movement.
Intermittent strategy for P0367: reproduce heat, vibration, cold soak, refueling, tank movement, or engine load while recording the relevant signal. Save the trace for direct pre/post-repair comparison.
Related-code strategy for P0367: misfire, crank/cam, system-voltage, EVAP pressure, purge/vent, or fuel-level codes can expose a common cause. Use freeze-frame timing to identify the foundational fault.
Verification for P0367: repeat the original condition, confirm the previously abnormal waveform/current/leak/sender response is corrected, complete the applicable monitor, and inspect pending memory.
Technician Notes
Diagnose the wording of P0367: circuit low input.\n\nThe monitor evaluates Camshaft Position Sensor B Bank 1 signal electrical validity, waveform quality, and plausibility against crankshaft position and expected cam phase.\n\nEfficient first move: scope CMP Sensor B Bank 1 beside the crank signal and verify the sensor power/ground or magnetic pickup circuit from OEM information.\n\nPreserve freeze-frame and test evidence until root cause is proven.
Mechanic's Tip
For P0367, compare command, electrical response, physical action, and feedback. Finding the first link that stops matching expectations is faster than replacing the component named in the DTC.
Common Mistakes
- Replacing Camshaft Position Sensor B, Bank 1 circuit from the code name alone
- Clearing freeze-frame too early
- Using universal voltage/resistance/current values
- Checking continuity without loaded testing
- Ignoring shared feeds/grounds or mechanical conditions
- Skipping smoke/waveform/current testing when justified
- Skipping monitor/relearn verification
Tools Used During Diagnosis
- Enhanced graphing scan tool
- Digital multimeter
- OEM wiring diagram/service information
- Backprobe/terminal test tools
- Battery/charging-system tester
- Oscilloscope
- Cam/crank/reference correlation capability
- Timing inspection tools
Manufacturer Notes
Generic OBD-II camshaft-position definition. Sensor B often refers to the exhaust cam on DOHC applications, but naming is not universal. Hall, magnetoresistive, and variable-reluctance sensors require different tests.
Customer Explanation
Your vehicle stored P0367, meaning the computer found circuit low input in the Camshaft Position Sensing system. The code does not automatically prove Camshaft Position Sensor B, Bank 1 circuit is bad; wiring, control circuits, leaks, and mechanical conditions can create the same result.
Frequently Asked Questions
What does P0367 mean?
P0367 means the PCM identified circuit low input involving Camshaft Position Sensor B, Bank 1 circuit. The code describes the failed monitor, not automatically a failed part.
Can I drive with P0367?
Limit driving if there is hard starting, stalling, loss of synchronization, or sudden power loss. An intermittent timing-reference fault can stop the engine.
What should I check first for P0367?
Scope cmp sensor b bank 1 beside the crank signal and verify the sensor power/ground or magnetic pickup circuit from oem information. Save freeze-frame and related codes first.
Does P0367 prove the named component is bad?
No. Wiring, connectors, shared power/grounds, mechanical conditions, and control-module strategy can create the same code.
Will P0367 affect emissions testing?
Usually yes if the MIL is commanded on, and clearing codes before inspection can leave readiness monitors incomplete.
Can low battery voltage contribute to P0367?
Yes. Low cranking or charging voltage can affect ignition drivers, position signals, glow-system current, EVAP solenoids, and sensor references.
Should I clear P0367 before diagnosis?
No. Freeze-frame, pending codes, misfire data, EVAP test status, and related DTCs are valuable evidence.
When is professional equipment justified for P0367?
When visual inspection and basic circuit checks do not prove the cause. A graphing/bidirectional scan tool, oscilloscope/current clamp, regulated EVAP smoke machine, or OEM service information may be required.
Can P0367 be intermittent?
Yes. Heat, vibration, terminal fretting, harness movement, moisture, sender movement, and driver faults can disappear in the shop.
How do I verify the repair?
Recreate the original operating condition, confirm the affected waveform/live data or leak test is normal, complete required relearn/readiness, and verify no current or pending code returns.
Related Atlas Resources
Use the related Atlas system chapter plus VIN-specific OEM service information for specification-level testing.
Diagnostic Confidence
High after the fault is reproduced and the electrical/physical cause is proven; Medium when intermittent and not reproducible
Related Codes
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