VOLVO
ECM-0336 - Engine speed (RPM) sensor. Faulty signal
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
4 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (12)
- Volvo C30 (2007–2013)2007–2010Engine B4164S3, D4204T only
- Volvo C30 (2007–2013)2011–2012Engine B4164S3 only
- Volvo C70 (2006–2013)2008Engine D4204T only
- Volvo C70 (2006–2013)2009–2010Engine D4204T only · Transmission MMT6, MPS6 only
- Volvo S40 (2004–2013)2004Engine D4204T, D4204T2 only
- Volvo S40 (2004–2013)2005–2006Engine B4164S3, D4204T, D4204T2 only
- Volvo S40 (2004–2013)2007–2010Engine B4164S3, D4204T only
- Volvo S40 (2004–2013)2011–2012Engine B4164S3 only
- Volvo V50 (2004–2013)2004Engine D4204T, D4204T2 only
- Volvo V50 (2004–2013)2005–2006Engine B4164S3, D4204T, D4204T2 only
- Volvo V50 (2004–2013)2007–2010Engine B4164S3, D4204T only
- Volvo V50 (2004–2013)2011–2012Engine B4164S3 only
What does this fault code mean?
The control module compares the sensor pulses with the expected pole count of the magnetic wheel. If the count differs by at least one pole, or the top dead centre reference position is missing, the fault is set. A damaged flywheel or ring gear can also cause it. It is checked while the engine runs, and the engine will not start.
Possible causes
- Contact resistance and oxidation in the connections
- Open circuit or short circuit in the wires to the sensor
- Incorrectly fitted engine speed (RPM) sensor
- Damaged engine speed (RPM) sensor or damaged magnetic wheel
- Damaged flywheel or ring gear
What you can do
- 1Switch off the ignition and check that the sensor is correctly fitted and is not damaged or dirty
- 2Check the sensor connector and the control module connector for contact resistance and oxidation. Clean the connector if it is oxidised
- 3Use a multimeter to check that the wires to the sensor have no open circuit and no short to ground or voltage
- 4If you have a diagnostic tool, read the engine speed in live data with the engine idling and see whether the value jumps irregularly
- 5If the wiring is intact, the sensor, the magnetic wheel or the flywheel may be damaged. Have a workshop with diagnostic equipment check them
Symptoms you may notice2
- The engine cranks but does not start
- The malfunction indicator lamp (MIL) is lit
General guidance for car owners. Diagnosis on the car can point to a different cause.