What does fault code ECM-P033800 mean?

Diagnostic fault code details for ECM-P033800 (Volvo S60 (2011–), Volvo S80 (2007–), Volvo S80 (2007–)). Repair service at OBD Tuning.

VOLVO

ECM-P033800 - Crankshaft Position Sensor A Circuit High Input. General Failure Information. No sub type information

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

3 models

S60 (2011–), S80 (2007–), V70 (2008–)

Show models by year and engine (9)

What does this fault code mean?

The engine control module (ECM) counts the teeth on the flywheel using the signal from the crankshaft position sensor. The fault is stored when the ECM counts at least one tooth too many over a set number of engine revolutions. The code does not say which type of fault it is.

Possible causes

Signal interference
Damaged flywheel or ring gear

What you can do

1If you have a diagnostic tool, start the engine and read the fault status. 'Fault found' means the fault is permanent.
2Check that the fuses are intact.
3Check that the crankshaft position sensor is correctly fitted in the right position and is not damaged or dirty.
4Check that no cable with high current draw, such as the starter motor cable, lies too close to the sensor or its wiring.
5If you have a diagnostic tool, follow the engine speed in live data while the engine runs and check that the value is steady.
6If the fault remains, have a workshop check the flywheel and the carrier plate for damage.

Symptoms you may notice2

Engine is hard to start
Poor performance

What the fault can affect2

If the camshaft sensor has been adapted, the ECM uses its signal instead
Variable valve timing (VVT) control is blocked

General guidance for car owners. Diagnosis on the car can point to a different cause.