VOLVO
ECM-P015600 - Heated oxygen sensor (HO2S) circuit (bank 2, sensor 2). General fault information. No information about fault type
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
1 modelXC90 (2003–)
Show models by year and engine (1)
What does this fault code mean?
The engine control module (ECM) monitors the rear oxygen sensor in bank 2 and sets the code if the limit values have not been reached after a certain time, even though the heater has reached its values. The test requires the heater to be active and the car to have had at least one fuel cut-off.
Possible causes
- Contact resistance or oxidation in the connections
- Damaged rear oxygen sensor
What you can do
- 1Read the code, clear it and road test the car to see whether it comes back
- 2Check the connector to the rear sensor in bank 2 for contact resistance and oxidation; do not use rust solvent spray or grease
- 3If the connector is clean and intact, replace the rear oxygen sensor in bank 2
Symptoms you may notice1
- Check engine light (MIL) on
What the fault can affect1
- Control with the rear oxygen sensor is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.