VOLVO
ECM-P034131 - Camshaft Position Sensor A Circuit Range/Performance (Bank 1 or single sensor). 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:
2 modelsS80 (2007–), V70 (2008–)
Show models by year and engine (2)
What does this fault code mean?
The engine control module (ECM) checks the camshaft sensor signal continuously while the engine runs. The fault is stored when the module detects that the signal is missing. It can lie in the sensor, in the supply and signal wires or in the ground.
Possible causes
- Loose connections
- Contact resistance or oxidation in the connections
- Open circuit or short circuit to ground in the supply wire to the sensor
- Open circuit or short circuit to ground in the signal wire
- Open circuit in the ground lead
- Damaged camshaft sensor
What you can do
- 1If you have a diagnostic tool, start the engine and read the fault status. 'No fault found' means the fault is not active right now.
- 2Check that the fuses are intact.
- 3With the ignition off, check that the connector at the camshaft sensor is secure and free from oxidation and contact resistance.
- 4Use a multimeter to check that the supply and signal wires to the camshaft sensor have no open circuit and are not shorted to ground.
- 5Check that the ground lead to the camshaft sensor is secure and not broken.
- 6If the fault returns, have a workshop check the camshaft sensor.
Symptoms you may notice1
- Engine does not start but cranks
General guidance for car owners. Diagnosis on the car can point to a different cause.