Error code
OBD2 P2340
OBD2P2340
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Cylinder #5 Above Knock Threshold.
Severity
moderateCan drive but should address soon to prevent further damage.
Summary
P2340 indicates that cylinder #5 is experiencing excessive knocking, which can be caused by ignition timing issues, faulty knock sensors, poor fuel quality, or mechanical problems in the engine.
Common Causes
- Ignition timing issue
- Faulty knock sensor
- Poor fuel quality
- Mechanical fault
Fixes
FAQ
What does P2340 mean?
P2340 means cylinder #5 is above the knock threshold, indicating excessive knocking in that specific cylinder.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P2300Ignition Coil 'A' Primary Control Circuit Low
- P2301Ignition Coil 'A' Primary Control Circuit High
- P2302Ignition Coil 'A' Secondary Circuit
- P2303Ignition Coil 'B' Primary Control Circuit Low
- P2304Ignition Coil 'B' Primary Control Circuit High
- P2305Ignition Coil 'B' Secondary Circuit
- P2306Ignition Coil 'C' Primary Control Circuit Low
- P2307Ignition Coil 'C' Primary Control Circuit High
- P2308Ignition Coil 'C' Secondary Circuit
- P2309Ignition Coil 'D' Primary Control Circuit Low
- P2310Ignition Coil 'D' Primary Control Circuit High
- P2311Ignition Coil 'D' Secondary Circuit