The exhaust valve deactivation system on bank 1 is electrically active but the mechanical response does not match commanded state.
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.
Most likely causes
- Oil sludge blocks deactivation pin
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: hard
- It affects emissions.
What each character of P341C means
- P: Powertrain: engine and transmission
- 3: Generic or manufacturer code, depending on the range
- 4: Emissions
- 1C: Specific fault in that system
Frequently asked questions
Can I keep driving with code P341C?
Drive little and gently. If you hear timing chain noise or the oil light comes on, shut off the engine.
What causes code P341C?
The most common causes are: oil sludge blocks deactivation pin.
Related codes
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.