OBD-II code · Powertrain (generic, extended)
P2342 Cylinder 7 Above Knock Threshold
Sustained knock above the threshold on cylinder 7 — usual causes are fuel quality, carbon deposits, or cooling issues at this cylinder.
Is it safe to drive with P2342?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyLow octane or contaminated fuel
- PossibleCarbon deposits raise compression locally
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–4 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Knock Sensor, Cylinder 7
Related codes
- P2336Cylinder 1 Above Knock Threshold
- P2337Cylinder 2 Above Knock Threshold
- P2338Cylinder 3 Above Knock Threshold
- P2339Cylinder 4 Above Knock Threshold
- P2340Cylinder 5 Above Knock Threshold
- P2341Cylinder 6 Above Knock Threshold
- P2343Cylinder 8 Above Knock Threshold
- P233FFuel Pressure Regulator B Solenoid Supply Voltage Control Circuit High
- P2344Cylinder 9 Above Knock/Combustion Vibration Sensor Threshold
- P2345Cylinder 10 Above Knock/Combustion Vibration Sensor Threshold
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.