Cylinder 6 is the last cylinder of inline-six and V6 engines, and P2341 reports that its share of the knock sensor signal has crossed the limit. Modern knock control adjusts ignition timing for every cylinder on its own, so a single cylinder can run retarded while the others keep optimum spark; the code tells which one keeps knocking. How a manufacturer reports this differs: GM and Saab use P0324 for excessive knock on one cylinder over more than 8 s, while knock on more than one cylinder or an improperly bolted sensor leads Saab to the sensor performance codes P0326/P0331. No public manufacturer document using P2341 was found. Check fuel quality, deposits, the plug and the injector of cylinder 6, and whether a loose part is making noise in that crank window.
Medium severity. Can I keep driving?You can drive in moderation without pushing the engine. If you hear knocking, avoid full-throttle acceleration.
Cylinder 6 is numbered according to the manufacturer: check your engine's manual before working on it.
Symptoms
- MIL on
- Knocking at full throttle or uphill
- Reduced power
Most likely causes
- Fuel octane too low for the engine
- Deposits in the combustion chamber of cylinder 6
- Loose component or valve train noise read as knock
- Lean mixture in cylinder 6 from a restricted injector
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
- It affects emissions.
What each character of P2341 means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- 3: Ignition and misfires
- 41: Specific fault in that system
Frequently asked questions
Can I keep driving with code P2341?
You can drive in moderation without pushing the engine. If you hear knocking, avoid full-throttle acceleration.
What causes code P2341?
The most common causes are: fuel octane too low for the engine; deposits in the combustion chamber of cylinder 6; loose component or valve train noise read as knock.
Related codes
- P2340Cylinder 5 Above Knock/Combustion Vibration Sensor Threshold
- P2342Cylinder 7 Above Knock/Combustion Vibration Sensor Threshold
- P0324Knock/Combustion Vibration Control System Error
- P0326Knock/Combustion Vibration Sensor A Circuit Range/Performance
- P0331Knock/Combustion Vibration Sensor B Circuit Range/Performance
- P0306Cylinder 6 Misfire Detected
Sources
- saabwisonline.com: dtc p0324 p0326 p0331 p06b6 or p06b7
- en.wikipedia.org: Engine knocking
- law.cornell.edu: 13 CCR 1968.2
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.