VOLVO
ECM-P233900 - Cylinder #4 Above Knock Threshold. General Failure Information. No sub type information
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
2 modellerS80 (2007–), V70 (2008–)
Vis modeller per årsmodell og motor (2)
Hva betyr feilkoden?
The engine control module (ECM) listens for combustion knock through a knock sensor on the engine block and retards the ignition when needed to stop the knock continuing. The code is set once knocking from cylinder 4 rises above a certain level, and
Mulige årsaker
- The engine runs on a fuel/air mixture that is too lean
- Poor fuel quality, for example summer fuel in winter
- The engine is overheated
- The intake air temperature is too high
- The knock sensor is loosely fitted
- The knock sensor is damaged
Hva du kan gjøre
- 1The fuses should be intact; their locations are shown in the car's owner's manual
- 2Inspect the connector and cable to the knock sensor for loose contacts, corrosion and chafing
- 3Check that the knock sensor is firmly fitted to the engine block
- 4Check that the fuel is right for the season and that the engine has not overheated
- 5If you have a diagnostic tool, compare the intake air temperature in live data with the outside air temperature
- 6If the fault returns, have a workshop with diagnostic equipment check the knock sensor and the engine's fuel/air mixture
Symptomer du kan merke1
- The engine performs poorly
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