VOLVO
ECM-2336 - Cylinder #1 Above Knock Threshold
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
3 modelsC30 (2007–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (9)
- Volvo C30 (2007–2013)2008–2009Engine B4184S11, B4184S8, B4204S3 only
- Volvo C30 (2007–2013)2010Engine B4184S11, B4184S8, B4204S3, B4204S4 only
- Volvo C30 (2007–2013)2011–2013Engine B4204S3, B4204S4 only
- Volvo S40 (2004–2013)2008–2009Engine B4184S11, B4184S8, B4204S3 only
- Volvo S40 (2004–2013)2010Engine B4184S11, B4184S8, B4204S3, B4204S4 only
- Volvo S40 (2004–2013)2011–2012Engine B4204S3, B4204S4 only
- Volvo V50 (2004–2013)2008–2009Engine B4184S11, B4184S8, B4204S3 only
- Volvo V50 (2004–2013)2010Engine B4184S11, B4184S8, B4204S3, B4204S4 only
- Volvo V50 (2004–2013)2011–2012Engine B4204S3, B4204S4 only
What does this fault code mean?
The engine control module (ECM) adjusts the ignition when combustion knock occurs, so that the knock does not continue. The code is set when knock events from cylinder 1 exceed what the module allows. The knock sensor is mounted on the engine block.
Possible causes
- Engine running on a lean fuel/air mixture
- Poor fuel quality, for example summer fuel in winter
- Engine running too hot
- Intake air temperature too high
- Knock sensor fitted loosely
- Damaged knock sensor
What you can do
- 1Read and clear the code, then road test with the engine warm and under load
- 2Check that the petrol is the grade suited to the season, since the wrong fuel can cause knock
- 3Check that the connector to the knock sensor is secure and clean
- 4If you have a diagnostic tool: see whether the ignition timing is pulled back when the engine knocks during driving
- 5If the fault remains after these checks, have a workshop decide whether the knock sensor should be replaced
Symptoms you may notice1
- Poor performance
General guidance for car owners. Diagnosis on the car can point to a different cause.