VOLVO
ECM-2C3C - Injector cyl 4. Signal too high
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
2 modelsS80 (1999–2006), XC90 (2003–)
Show models by year and engine (2)
What does this fault code mean?
The signal to the injector for cylinder 4 is too high. The wire may have been shorted to supply voltage, or the injector may be damaged.
Possible causes
- Cylinder 4 wire shorted to supply voltage
- Damaged injector for cylinder 4
What you can do
- 1Clear the code and road test to see whether it returns
- 2Look for where the cylinder 4 wire may have been pinched or chafed so that it touched supply voltage
- 3With ignition on, use a multimeter to check that the cylinder 4 wire is not shorted to supply voltage
- 4If you have a diagnostic tool: read the cylinder 4 injector value in live data with ignition on and compare it with the other cylinders
- 5Ask a workshop to check the cylinder 4 injector with diagnostic equipment
Symptoms you may notice2
- The malfunction indicator lamp (MIL) is on
- The engine is not running on all cylinders
General guidance for car owners. Diagnosis on the car can point to a different cause.