VOLVO
ECM-0325 - Knock sensor. Faulty signal
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
5 modellerC30 (2007–2013), S40 (1996–2004), S40 (2004–2013), V40 (1996–2004), V50 (2004–2013)
Vis modeller per årsmodell og motor (16)
- Volvo C30 (2007–2013)2007–2009Kun motor: B4164S3, B4184S11, B4184S8, B4204S3
- Volvo C30 (2007–2013)2010Kun motor: B4164S3, B4184S11, B4184S8, B4204S3, B4204S4
- Volvo C30 (2007–2013)2011–2012Kun motor: B4164S3, B4204S3, B4204S4
- Volvo C30 (2007–2013)2013Kun motor: B4204S3, B4204S4
- Volvo S40 (1996–2004)2001–2004Kun motor: B4184SJ
- Volvo S40 (2004–2013)2005Kun motor: B4164S3, B4184S11
- Volvo S40 (2004–2013)2006Kun motor: B4164S3, B4184S11, B4184S8
- Volvo S40 (2004–2013)2007–2009Kun motor: B4164S3, B4184S11, B4184S8, B4204S3
- Volvo S40 (2004–2013)2010Kun motor: B4164S3, B4184S11, B4184S8, B4204S3, B4204S4
- Volvo S40 (2004–2013)2011–2012Kun motor: B4164S3, B4204S3, B4204S4
- Volvo V40 (1996–2004)2001–2004Kun motor: B4184SJ
- Volvo V50 (2004–2013)2005Kun motor: B4164S3, B4184S11
- Volvo V50 (2004–2013)2006Kun motor: B4164S3, B4184S11, B4184S8
- Volvo V50 (2004–2013)2007–2009Kun motor: B4164S3, B4184S11, B4184S8, B4204S3
- Volvo V50 (2004–2013)2010Kun motor: B4164S3, B4184S11, B4184S8, B4204S3, B4204S4
- Volvo V50 (2004–2013)2011–2012Kun motor: B4164S3, B4204S3, B4204S4
Hva betyr feilkoden?
The engine control module (ECM) either receives no signal from the knock sensor when engine speed and load are above a certain level, or receives a signal the control module cannot rely on. The knock sensor detects when combustion becomes irregular. The fault is checked with the engine running and while driving, and it may be noticed as knocking from the engine.
Mulige årsaker
- Contact resistance in the connectors
- Knock sensor installed loosely
- Open circuit or short to ground or voltage in the signal wire from the knock sensor
- Open circuit in the ground wire or ground wire shorted to voltage
- Defective or damaged knock sensor
Hva du kan gjøre
- 1Read out the fault code, erase it and road-test to see whether it returns
- 2Switch off the ignition and check that the knock sensor is firmly fitted. If the car has more than one knock sensor, the front one is the main one to check
- 3Check the connectors to the knock sensor and the control module for contact resistance and oxidation
- 4Use a multimeter to check that the signal wire from the knock sensor has no open circuit and is not shorted to ground or voltage
- 5If you have a diagnostic tool, check in live data that the knock sensor signal appears during a road test, also under load and not only at idle
- 6If no fault is found in the wiring, the knock sensor is the likely cause. Have a workshop confirm this before you replace it
Symptomer du kan merke2
- The malfunction indicator lamp (MIL) is lit
- The engine may knock
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