Error code
OBD2 P0311
OBD2P0311
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Cylinder 11 Misfire Detected.
Severity
moderateCan be driven, but performance and efficiency will suffer.
Summary
P0311 indicates that cylinder number 11 is misfiring in your vehicle's engine.
Symptoms
- Vibrations at idle
- Decreased engine performance and fuel economy
Common Causes
- Faulty spark plug in cylinder #11
- Defective coil for cylinder #11
- Wiring issues related to cylinder #11
- Malfunctioning fuel injector for cylinder #11
Diagnosis
- Check the spark plug in cylinder #11 by swapping it with a known good one from another cylinder.
- Inspect the fuel injector for cylinder #11 to ensure proper function.
- Verify wiring connections related to cylinder #11 are secure and not damaged.
Fixes
- Replace faulty spark plug, coil, or fuel injector in cylinder #11
FAQ
What should I do if the misfire persists after replacing components?
If the misfire continues despite component replacement, check for compression issues such as exhaust valve or head gasket leaks.
Is there a specific tool recommended to diagnose this issue?
A torque wrench and diagnostic scanner can help identify faulty components in cylinder #11.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0300Random/Multiple Cylinder Misfire Detected
- P0301Cylinder 1 Misfire Detected
- P0302Cylinder 2 Misfire Detected
- P0303Cylinder 3 Misfire Detected
- P0304Cylinder 4 Misfire Detected
- P0305Cylinder 5 Misfire Detected
- P0306Cylinder 6 Misfire Detected
- P0307Cylinder 7 Misfire Detected
- P0308Cylinder 8 Misfire Detected
- P0309Cylinder 9 Misfire Detected
- P0310Cylinder 10 Misfire Detected
- P0312Cylinder 12 Misfire Detected