VOLVO
ECM-P008500 - Exhaust valve control circuit low (bank 2). General fault information. Type of fault not specified.
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
2 modelsS80 (2007–), XC90 (2003–)
Show models by year and engine (2)
What does this fault code mean?
The engine control module (ECM) adjusts the exhaust camshaft position on bank 2 with a changeover valve. The fault code is set when the control signal to the valve is too low. The causes are poor contact, or a wire to the valve shorted to ground.
Possible causes
- Contact resistance in the connectors
- Signal wire shorted to ground
- Voltage supply wire shorted to ground
- Damaged exhaust camshaft changeover valve
What you can do
- 1Check the fuse for the valve circuit. If it has blown, use a multimeter to look for a short to ground in the wire
- 2Check the valve connector for contact resistance and oxidation, and press it firmly into place
- 3Measure the valve resistance, or have a workshop do it
- 4With the connectors disconnected, use a multimeter to check that the signal and supply wires are not shorted to ground or to voltage
- 5If the fault remains after these checks, have a workshop with diagnostic equipment check the control module
Symptoms you may notice4
- Check engine lamp (MIL) lights up
- Uneven idle
- Poor performance
- The engine can stall while driving
What the fault can affect1
- Exhaust camshaft control is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.