VOLVO
ECM-P033531 - Crankshaft Position Sensor A Circuit. FM (Frequency Modulated) / PWM (Pulse Width Modulated) Failures. No signal
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (8)
- Volvo S80 (2007–)2007–2009Engine D5244T4, D5244T5 only
- Volvo S80 (2007–)2010–2011Engine D4164T only
- Volvo V70 (2008–)2008–2009Engine D5244T4, D5244T5 only
- Volvo V70 (2008–)2010–2011Engine D4164T only
- Volvo XC60 (2009–)2009All engines except: B6304T2
- Volvo XC70 (2008–)2008All engines except: B6324S
- Volvo XC70 (2008–)2009Engine D5244T4, D5244T5 only
- Volvo XC90 (2003–)2013–2014Engine D5244T18, D5244T5 only
What does this fault code mean?
The engine control module (ECM) monitors the crankshaft sensor signal and sets the fault code when the signal is missing or wrong. The causes may be poor connections, breaks or short circuits in the wiring, an incorrectly fitted or damaged sensor, or engine speed that is too high.
Possible causes
- Contact resistance or oxidation in the connections
- Break in the crankshaft sensor wiring
- Incorrectly fitted crankshaft sensor
- Damaged crankshaft sensor
- Engine speed too high
- Short circuit in the crankshaft sensor wiring
What you can do
- 1Read the fault code, clear it and test drive the car to see whether it returns
- 2Check that the fuses are intact; their locations are shown in the owner's manual or on the fuse box cover
- 3Check the connectors at the crankshaft sensor for oxidation and contact resistance, and make sure they are firmly seated
- 4Check the crankshaft sensor wiring for breaks and short circuits; with a multimeter, confirm that it has no contact with ground (the body) or with voltage
- 5Have a workshop with diagnostic equipment check and, if needed, replace the crankshaft sensor
Symptoms you may notice4
- The engine does not start
- Poor performance and lack of power while driving
- The engine stalls
- The starter motor does not turn, or a clicking sound is heard when starting is attempted
General guidance for car owners. Diagnosis on the car can point to a different cause.