VOLVO
ECM-0204 - Injector 4. Signal missing
System
Engine Control Module (ECM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
4 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (10)
- Volvo C30 (2007–2013)2007Engine D4204T only
- Volvo C30 (2007–2013)2008–2010Engine D4204T only · Transmission MMT6, MPS6 only
- Volvo C70 (2006–2013)2008Engine D4204T only
- Volvo C70 (2006–2013)2009–2010Engine D4204T only · Transmission MMT6, MPS6 only
- Volvo S40 (2004–2013)2004–2006Engine D4204T, D4204T2 only
- Volvo S40 (2004–2013)2007Engine D4204T only
- Volvo S40 (2004–2013)2008–2010Engine D4204T only · Transmission MMT6, MPS6 only
- Volvo V50 (2004–2013)2004–2006Engine D4204T, D4204T2 only
- Volvo V50 (2004–2013)2007Engine D4204T only
- Volvo V50 (2004–2013)2008–2010Engine D4204T only · Transmission MMT6, MPS6 only
What does this fault code mean?
Although the code is named signal missing, it applies when the signal to the injector for cylinder 4 is faulty. The engine control module drives the injectors through a high-output stage. The fault concerns cylinder 4 only, but it can be clearly felt while driving.
Possible causes
- Poor contact, with loose connections or oxidation at the injector
- Break in the signal wire
- Signal wire shorted to ground or supply voltage
- Damaged injector
What you can do
- 1Read the fault code, clear it and road test to see whether it returns
- 2Check that the connector to the cylinder 4 injector is fully engaged and free from oxidation
- 3Follow the two wires to the cylinder 4 injector and look for breaks, chafing and shorts to ground
- 4With the connector unplugged, use a multimeter to check that the wires have no connection to ground (the body)
- 5If you have a diagnostic tool, compare the cylinder 4 injector with the others in live data. A clear difference points to it
- 6If the fault remains, have a workshop check the injector output stage and decide whether the injector should be replaced
Symptoms you may notice2
- Car drives poorly and lacks power
- Text message and warning symbol in the display
What the fault can affect2
- Engine speed may be limited
- The car goes into limp-home mode
General guidance for car owners. Diagnosis on the car can point to a different cause.