P2341
Cylinder 6 Above Knock/Combustion Vibration Sensor Threshold
Knock control / ignition
Generic OBD-II
Medium
What it means
P2341 means the knock sensor detected combustion knock (detonation) on cylinder 6 above the allowed threshold. Knock is uncontrolled combustion that, over time, can damage pistons and rings. The PCM usually retards ignition timing to protect the engine, which reduces power. It points either to a real knock source on that cylinder or to a sensor/signal issue reporting false knock.
Medium
Can I keep driving? Usually yes, but heavy or persistent knock can damage the engine; go easy on throttle and load and address the cause soon.
Common symptoms
What you'll notice
- Check-engine light on
- Audible knock or pinging under load or acceleration
- Reduced power as timing is pulled to protect the engine
- Possible rough running from that cylinder
Common causes
Most likely first
- Actual detonation from low-octane fuel, carbon buildup, or overheatingLikely
- Lean mixture or a vacuum/intake leak affecting that cylinderCommon
- Faulty knock sensor or poor connection reading noise as knockCommon
- Cooling problem or EGR fault raising combustion temperatureLess often
- Mechanical wear or fault on cylinder 6Less often
How to diagnose & fix
Work through it in order
- Refuel with fresh, correct-octane fuel and recheck; an induction/fuel-system cleaning helps with carbon.
- Check for lean conditions, vacuum leaks, and proper EGR operation.
- Verify the engine cooling system and that it isn't overheating.
- Test the knock sensor and wiring to confirm it isn't reporting false knock.
- Address any mechanical cause on cylinder 6, then clear the code and road-test.
FAQ
Quick answers
Is it safe to drive with P2341?+
Light use is usually okay, but sustained knock can damage pistons and rings. Avoid hard acceleration and fix the cause promptly.
Can I just clear P2341?+
It returns if knock is still occurring. Resolve the fuel, cooling, or sensor cause first.
Related codes
Often seen with P2341
Read & clear P2341 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX