What it means
The control module detects a high signal from camshaft profile actuator position sensor C on bank 1. The signal does not reliably indicate the actuator’s position.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
- The engine or gearbox may go into limp mode
How it works
The camshaft profile actuator changes the engine’s valve profile, while position sensor C reports its position to the control module. The module sets P2C10 when the Bank 1 sensor C signal is higher than its expected electrical range, so the actuator’s position cannot be confirmed reliably.
Common causes
Most likely first.
- Signal wire shorted to B+
- Open position sensor
- Connector pins corroded - high contact resistance
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
How to diagnose it
- Record freeze-frame data and compare live sensor C position on Bank 1 with commanded actuator position to establish when the high signal appears.
- Inspect sensor C’s Bank 1 connector and wiring for corrosion, loose pins, chafing, or insulation damage near a power feed.
- Check the sensor circuit’s supply, ground, and signal using the vehicle wiring information, looking for a signal wire shorted to B+.
- Move the harness while monitoring the signal to find an intermittent short or connection that drives it high.
- If the wiring and connector are sound, test sensor C on Bank 1 for an open or failed sensor against the manufacturer’s specification.
Common fixes
- Clean and secure corroded or loose connector pins at Bank 1 sensor C.
- Repair a signal wire shorted to B+ or other damaged sensor wiring.
- Replace an open or failed camshaft profile actuator position sensor C on Bank 1.
- Clear the code and confirm sensor C tracks actuator movement.
Can I keep driving?
Drive gently only if the engine runs smoothly and responds normally; avoid hard acceleration because Bank 1 valve-profile control may be limited. Stop if it stalls or loses substantial power.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.