The position sensor A of camshaft profile actuator on the exhaust side of bank 1 reports a circuit condition. Cam profile selection feedback cannot be measured reliably.
Medium severity. Can I keep driving?Drive little and gently. If you hear timing chain noise or the oil light comes on, shut off the engine.
Bank 1 is the side of the engine with cylinder 1. Inline engines only have this bank.
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Most likely causes
- Position sensor failed
- Wiring or connector fault
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
- It can trigger limp mode.
- It affects emissions.
What each character of P2C12 means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- C: Subsystem depends on the code range
- 12: Specific fault in that system
Frequently asked questions
Can I keep driving with code P2C12?
Drive little and gently. If you hear timing chain noise or the oil light comes on, shut off the engine.
What causes code P2C12?
The most common causes are: position sensor failed; wiring or connector fault.
Related codes
- P2C16B Camshaft Profile Actuator Position Sensor B Circuit Bank 1
- P2C0DA Camshaft Profile Actuator Position Sensor C Circuit Bank 1
- P2C1AB Camshaft Profile Actuator Position Sensor C Circuit Bank 1
- P2C09A Camshaft Profile Actuator Position Sensor B Circuit Bank 1
- P2C05A Camshaft Profile Actuator Position Sensor A Circuit Bank 1
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.