VOLVO
ECM-1203 - Fuel injection system driver. Signal missing
System
Engine Control Module (ECM)
Volvo models this fault code applies to
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?
This code applies to the injector valve on cylinder 3, where the injection time has been incorrect. The control module has its own output stage for each injector and compares the time of every injection with the expected value. The last digit of the code shows cylinder 3.
Possible causes
- Contact resistance, oxidation or poor contact in the connections
- Open circuit in the signal cable (+)
- Open circuit in the signal cable (-)
- Damaged injector
What you can do
- 1Read the codes, clear them and road test to see whether the code comes back
- 2Check the connector on the cylinder 3 injector for play and oxidation
- 3Use a multimeter to check that the two wires to cylinder 3 are not broken and have no contact with ground or supply voltage
- 4If the code returns after clearing and a test drive and no fault is found, a workshop should try a new injector valve
Symptoms you may notice2
- The engine lacks power and runs poorly
- A message and a warning symbol appear in the display
What the fault can affect2
- Engine speed is limited
- The car can be driven in limp-home mode
General guidance for car owners. Diagnosis on the car can point to a different cause.