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Home / DTC / P2C06 — A Camshaft Profile Actuator Position Sensor A Range/Performance Bank 1

P2C06 — A Camshaft Profile Actuator Position Sensor A Range/Performance Bank 1

Detailed page for trouble code P2C06.

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P2C06

Generic P — Powertrain

A Camshaft Profile Actuator Position Sensor A Range/Performance Bank 1

Brand: Generic
Type: P — Powertrain
Views: UK: 14 EN: 29 RU: 19
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Page language: EN

Causes

  • Faulty camshaft profile/position sensor A (bank 1)
  • Damaged wiring harness or poor connector connection to the sensor
  • Contaminated or low engine oil causing VVT actuator to stick or operate slowly
  • Faulty VVT solenoid or camshaft phaser (actuator) mechanically stuck
  • PCM/software fault or incorrect adaptation
  • Internal engine timing issue (worn timing chain, damaged sprocket)

Symptoms

  • Check Engine Light (MIL) illuminated
  • Reduced engine performance or limp-in mode
  • Rough idle, stumbling or hesitation
  • Poor fuel economy
  • Hard starting or extended cranking
  • Unusual engine noise if timing chain/phaser damage present

What to check

  • Read freeze frame and live data with a scan tool; record camshaft angle, commanded vs actual cam position, engine speed, oil temp and other related PIDs
  • Visual inspection of sensor, connector and wiring for damage, corrosion, or oil contamination
  • Check engine oil level and condition (very dirty or low oil can affect VVT operation)
  • Wiggle-test wiring while monitoring live data for intermittent changes
  • Backprobe sensor connector to verify reference voltage (usually 5V or switched reference), ground integrity and signal
  • Use an oscilloscope to observe sensor waveform at various RPMs; compare to factory reference if available

Signal parameters

  • Sensor type varies by vehicle (Hall-effect, magnetic/variable reluctance or potentiometric style) — expect either a 0–5 V digital/square waveform or an AC/sinusoidal waveform depending on sensor
  • Reference supply: typically 5 V or switched 12 V and a reliable ground — verify presence at connector
  • At idle: cam position signal should be stable and change smoothly with engine speed; deviations, noisy or clipped signals indicate a problem
  • Typical expected ranges: signal idle voltage often between ~0.5–4.5 V for Hall sensors; variable reluctance sensors produce an AC voltage proportional to RPM — consult vehicle data for exact values
  • Command vs actual cam angle: the PCM will command a change in cam angle; actual cam angle PID should move correspondingly within a few degrees (exact tolerance is vehicle-specific)
  • If waveform is intermittent, erratic or missing, suspect wiring, connector, sensor, or PCM input circuit

Diagnostic algorithm

  1. Retrieve DTCs and freeze-frame data; note engine conditions when fault set (RPM, temp, oil temp).
  2. Visually inspect the camshaft position sensor, connector and wiring harness for oil intrusion, damage or corrosion. Repair any obvious issues.
  3. Check engine oil level and condition; if very low or dirty, service oil and filter, then clear codes and retest.
  4. With ignition on (engine off), backprobe sensor connector: verify reference voltage and ground. If reference missing, trace wiring to fuse/PCM.
  5. Start engine and monitor live PIDs for commanded cam angle vs actual cam angle. Command the VVT (if scan tool allows) and observe actual cam response.
  6. Use a multimeter to check sensor signal for expected voltage or continuity. Use an oscilloscope to inspect waveform shape and noise at idle and increased RPM.
  7. If signal is absent or out of range at connector but correct at PCM harness, suspect wiring between connector and PCM or PCM input fault.
  8. Test the VVT oil control valve (solenoid) for electrical function and flow; replace or clean if clogged. Confirm phaser actuator moves when commanded (some actuation tests require removing valve cover or using scan-tool functions).
  9. If actuator doesn’t move electrically but solenoid and oil pressure are OK, inspect phaser/mechanical components (timing chain, sprockets) for wear or damage; repair as needed.
  10. Replace faulty sensor or VVT components only after verifying wiring and oil/camera function. Clear codes and perform road test to confirm repair. If code returns, consider PCM or further mechanical diagnosis.

Likely causes

  • Connector corroded or pins bent at the camshaft position sensor
  • Sensor output stuck high/low or intermittent due to internal failure
  • Oil control valve (VVT solenoid) clogged or leaking, preventing phaser movement
  • Low oil pressure or very dirty oil limiting actuator movement
  • Broken/loose timing chain or jumped timing causing cam/crank correlation error

Fault status

⚠️ Status
PCM detected Camshaft Profile Actuator Position Sensor A (Bank 1) output is outside expected range or does not follow commanded cam phaser position. This may be caused by sensor failure, wiring/connector issues, oil/VVT actuator problems, or mechanical timing faults. MIL set.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

P0340 P0341 P0011 P0012 P0016 P0026
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