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DTC codes / P2Cxx · Hybrid propulsion / P2C10

P2C10A Camshaft Profile Actuator Position Sensor C Circuit High Bank 1

P2C10 indicates the powertrain control module has detected an abnormally high voltage signal on the position sensor circuit for the camshaft profile actuator on bank 1. This sensor reports the actual position of the variable valve timing actuator, and a high circuit voltage tells the computer the signal wire is likely shorted to power or the sensor's internal electronics have failed.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaHybrid propulsion

Symptoms you may notice

  • Illumination of the check engine light, often with no other noticeable symptoms
  • Rough idle or unstable engine operation as the camshaft profile stays in a default position
  • Reduced engine power or a limp-home mode triggered by the control module
  • Poor fuel economy and increased emissions due to incorrect valve timing
  • Intermittent hesitation or stumble during acceleration when the actuator cannot be commanded

Common causes, most likely first

  1. Short to voltage on the sensor signal circuit, often from chafed wiring near the actuator or exhaust heat
  2. Failed camshaft profile actuator position sensor with an internal short
  3. Corroded, loose, or water-intruded connector pins at the sensor or harness
  4. Open or high-resistance ground circuit for the sensor causing a reference voltage shift
  5. Faulty powertrain control module driver or internal pull-up resistor (rare but possible)
  6. Aftermarket or incorrect sensor installed previously that does not match the required signal range

How to diagnose and fix it

  1. Connect a scan tool and record the freeze-frame data and sensor voltage reading with the key on and engine running
  2. Visually inspect the sensor connector and harness for chafing, corrosion, or signs of coolant or oil intrusion
  3. Back-probe the sensor signal wire and measure voltage against the manufacturer's specification while wiggling the harness
  4. Disconnect the sensor and check for a short to battery voltage on the signal circuit with the key on
  5. Measure resistance of the sensor ground circuit to the PCM ground to rule out an open or high-resistance ground
  6. Substitute a known-good sensor only after circuit tests confirm the wiring is intact, then clear codes and verify the repair
  7. If the circuit and sensor test good, perform a bidirectional actuator sweep with the scan tool to confirm the PCM can command and read the profile change

What a high signal really tells you

  • A high voltage code on a position sensor almost always means the signal wire is touching a power source or the sensor has an internal short, not that the actuator itself has failed mechanically.
  • Technicians often replace the camshaft profile actuator when the actual fault is a chafed signal wire rubbing against a bracket or exhaust shield near the bank 1 valve cover.
  • Water intrusion into the sensor connector can create a conductive path that pulls the signal voltage high only when the engine is cold or damp, so the code may not reappear during a warm shop test.
  • A failed ground circuit can cause the sensor to output a higher-than-normal voltage because the reference voltage has no stable return path, mimicking a short to power.
  • This code does not always mean the variable valve timing system is mechanically broken; the engine may run normally because the PCM defaults to a safe camshaft position when the signal is implausible.

Can I keep driving with P2C10?

You can usually drive the vehicle short distances to a repair shop, but avoid heavy acceleration and sustained high speeds because the engine may enter limp mode or run with incorrect valve timing. If the check engine light begins flashing or the engine runs very poorly, stop driving and have it towed.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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