P2343: Cylinder 8 exceeds the engine knock threshold
Cylinder 8 exceeds the engine knock threshold.
| Code | P2343 |
|---|---|
| System | Engine and transmission |
| Group | P23xx, Ignition coils and engine |
| Type | Generic: it means the same on every make |
How to read and clear P2343 with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P2343 with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P233F The fuel pressure regulator B solenoid power supply voltage control gives a
- P2340 Cylinder 5 exceeds the knock threshold
- P2341 Cylinder 6 exceeds the knock threshold
- P2342 Cylinder 7 exceeds the engine knock threshold
- P2344 Knock in cylinder 9 exceeds the expected threshold
- P2345 Knock in cylinder 10 exceeds the expected threshold
- P2346 Knock in cylinder 11 exceeds the expected threshold
- P2347 Knock in cylinder 12 exceeds the expected threshold
- P2300 Ignition coil A primary control circuit low
- P2301 Ignition coil A primary control circuit high
- P2303 Ignition coil B primary control circuit low
- P2304 Ignition coil B primary control circuit high
What does code P2343 mean?
Cylinder 8 exceeds the engine knock threshold.
How do you clear P2343?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P2343 comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
