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P0204
Fuel injector 4 circuit malfunction
Fuel injector 4 circuit malfunction
Documented for: 2.0L gasoline; 2.5L/3.0L gasoline · System(s): EMS EOBD, EMS OBD II · Factory MIL flag: 2 · Default action: ECM Default: –Bank 2 closed loop fuel metering inhibited –Bank 2 adaptive fuel metering inhibited –Bank 2 catalyst warm up ignition retard inhibited –Canister purge inhibited –Maxi…
Common causes
- Injector disconnected Injector harness wiring: open circuit
- short circuit Injector failure
- Injector Circuit/Open - Cylinder 4
Quick checks
- Confirm freeze-frame and conditions when the code set
- Inspect connectors, grounds, and harness for the circuit named in the code
- Compare live sensor values vs expected (unplugged/biased sensors are common)
- Swap coil/plug to another cylinder if misfire is cylinder-specific
Typical fixes
- Inspect wiring to injector 4
- replace injector