VOLVO
ECM-P155484 - Cylinder 4 Injector Circuit Range/Performance. Bus Signal / Message Failures. Signal below allowable range
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (6)
- Volvo S80 (2007–)2007–2009Engine D5244T4, D5244T5 only
- Volvo V70 (2008–)2008–2009Engine D5244T4, D5244T5 only
- Volvo XC60 (2009–)2009All engines except: B6304T2
- Volvo XC70 (2008–)2008All engines except: B6324S
- Volvo XC70 (2008–)2009Engine D5244T4, D5244T5 only
- Volvo XC90 (2003–)2013–2014Engine D5244T18, D5244T5 only
What does this fault code mean?
The fault concerns the control of the injection valve for cylinder 4. The engine control module (ECM) drives it through internal output stages and detects when something is wrong. The causes are contact resistance and corrosion at the connector, or the valve being clogged or leaking.
Possible causes
- Contact resistance and corrosion in the injection valve connector
- The injection valve is clogged or leaking
What you can do
- 1Check the connector to the cylinder 4 injection valve for contact resistance and corrosion.
- 2With the ignition off, disconnect the connector and check that the contact surfaces are clean.
- 3With the ignition off, use a multimeter to check that the signal wire has no break and is not shorted to ground.
- 4If you have a diagnostic tool, read the status of the cylinder 4 injection valve with the engine running.
- 5Cylinder 4 is the fourth cylinder counted from the right-hand side of the vehicle, with cylinder 1 furthest from the flywheel.
- 6If nothing is found in these checks, the cause may lie in the engine control module, so have a workshop check it.
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.