What it means
A Camshaft Profile Actuator C Control Circuit High (Bank 1): the control-circuit voltage is above the expected range. This relates to engine timing; a fault can cause rough running, a no-start, or timing errors.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The Bank 1 camshaft profile actuator A position C control circuit drives the mechanism that selects profile C. This code sets when circuit voltage is higher than the module expects, commonly because the control wire is shorted to battery positive.
Common causes
Most likely first.
- Short to B+
- Connector pins corroded - high contact resistance
- Supply wire pinched against B+ source
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 confirm the high reading is associated with commands for Bank 1 actuator A position C.
- Inspect the position C harness for pinched insulation or contact with battery-positive wiring and check the connector for corrosion or displaced pins.
- Use the wiring diagram to test the control wire for a short to battery positive, isolating sections as specified by the manufacturer.
- Compare circuit readings at the solenoid connector and module connector with the manufacturer's specification to locate the high-voltage source.
- If the external circuit is sound, test the position C solenoid and module driver for an internal fault.
Common fixes
- Repair the control wire where it is shorted to battery positive.
- Reroute or secure pinched wiring and replace damaged insulation.
- Clean or repair corroded or displaced terminals at the position C connector.
- Replace the solenoid or repair the module driver only if circuit testing identifies that component as the cause.
Can I keep driving?
Limit driving and avoid hard acceleration if the engine still runs smoothly, since the Bank 1 cam profile may not respond correctly. Stop if the engine stalls or runs very roughly.
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.