The position sensor for exhaust heat exchanger bypass valve A reports a circuit condition. Heat recovery routing cannot be verified reliably.
Medium severity. Can I keep driving?You can usually keep driving in the short term. If you smell exhaust fumes in the cabin, stop driving and ventilate the car.
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
What each character of P2C22 means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- C: Subsystem depends on the code range
- 22: Specific fault in that system
Frequently asked questions
Can I keep driving with code P2C22?
You can usually keep driving in the short term. If you smell exhaust fumes in the cabin, stop driving and ventilate the car.
What causes code P2C22?
The most common causes are: position sensor failed; wiring or connector fault.
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.