VOLVO
ECM-0533 - Air conditioning (A/C) pressure sensor. Signal too high
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)
What does this fault code mean?
The engine control module monitors the A/C pressure sensor and sets the fault when it registers a fault in the control of the sensor. The cause is a signal wire shorted to voltage. The driver is not normally aware of the fault.
Possible causes
- Signal wire short-circuited to voltage
What you can do
- 1Read out the fault code, erase it and road-test to see whether it returns
- 2Switch off the ignition and unplug the A/C pressure sensor connector. Use a multimeter to check that the signal wire is not shorted to voltage
- 3Look for wires that may have rubbed against a live part
- 4If the fault remains, have a workshop with diagnostic equipment check and, if needed, replace the A/C pressure sensor
Symptoms you may notice1
- No noticeable symptoms for the driver
General guidance for car owners. Diagnosis on the car can point to a different cause.