

P0203 - Injector Circuit Malfunction Cylinder 3 At the PCM, remove the driver wire from the PCM connector and Ground the.Swap the injector with another one and see if the code changes. If the injector operates, then you likely have either an open If you have access to an injector tester, activate the injector and see.Visually check the injector for damage.Visually check the connector for damage or broken wires.Check for voltage at the fuel injector connector.First, using a DVOM check the resistance of the injector.The possibility of one of the other causes This is usually the cause of this code but doesn't rule out

The causes of a P0204 engine light code could be any of the following:
