VOLVO
ECM-P155100 - Cylinder 1 Injector Circuit Range/Performance. General Failure Information. No sub type information
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 (9)
- Volvo S80 (2007–)2007Engine D5244T4, D5244T5 only
- Volvo S80 (2007–)2008–2009Engine D4204T, D5244T4, D5244T5 only
- Volvo S80 (2007–)2010Engine D4204T only
- Volvo V70 (2008–)2008–2009Engine D4204T, D5244T4, D5244T5 only
- Volvo V70 (2008–)2010Engine D4204T 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 engine control module (ECM) monitors the signal to the injection valves and their injection quantity. The code is set when the signal to the injection valve for cylinder 1 is incorrect, or when the injection quantity is too large.
Possible causes
- Contact resistance or corrosion in the connectors and connections
- Loose connector
- Open circuit in the signal wire, or in the positive or negative wire
- Damaged injection valve
- With fault code ECM-P120112: the signal wire is shorted to voltage, or the injection valves are damaged
- With fault code ECM-P120111: a short between the signal wires, or the signal wire is shorted to ground
What you can do
- 1Cylinder 1 is the one furthest from the flywheel, counted from the right-hand side of the vehicle.
- 2Check that the fuses are intact. Their location is in the owner's manual or on the fuse box cover.
- 3Check the connector to the cylinder 1 injection valve for looseness, contact resistance and corrosion.
- 4With the ignition off, use a multimeter to check that the wires to the cylinder 1 injection valve have no break and no contact with ground or voltage.
- 5If you have a diagnostic tool, activate the cylinder 1 injection valve and listen for it working.
- 6If the fault remains, have a workshop check the cylinder 1 injection valve and its control.
Symptoms you may notice4
- The engine may be hard to start, or not start at all, and this may be noticeable all the time or only now and then
- Yellow warning symbol and text message in the display
- The check engine lamp lights or behaves abnormally
- The engine lacks power or performs poorly
What the fault can affect3
- Injection from cylinder 1 stops
- The engine speed is limited
- The car may go into limp home mode
General guidance for car owners. Diagnosis on the car can point to a different cause.