OBD-II reference

All 9.533 generic OBD-II codes, explained in detail.

Causes, inspection steps and sources — a comprehensive DIY archive. Created and maintained with love for the detail. Good luck and have fun!

Powertrain generic / SAE

P2345

Cylinder 10 Above Knock/Combustion Vibration Sensor Threshold

The knock or combustion-vibration sensor monitors the structure-borne noise of each cylinder. The signal level for cylinder 10 has stayed above the diagnostic threshold for an extended period, indicating either persistent knock or an electrical fault that biases the channel high.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number3 / 45

Possible causes

  • Persistent knocking on cylinder 10 high
  • Sensor or wiring biased high medium
  • Gateway module routing CAN messages incorrectly low

Inspection / repair

  • Difficulty: medium
  • DIY: shop recommended
  • Estimated cost: 120–1500 €
  • Estimated time: 0.8–4 h
  • Component: knock sensor
  • Component: knock sensor wiring
  • Component: cylinder 10 combustion
  • MIL / check engine light
  • emissions-relevant

Sources

References

How to read OBD-II codes

The first letter names the vehicle system, the second digit distinguishes generic from manufacturer-specific, the remaining digits group fault area and number.

PPowertrain: engine, transmission, emissions
BBody: chassis trim, comfort, interior
CChassis: suspension, brakes, steering
UNetwork: CAN, control modules, communication