DTC 1-4-5 Injector 4
1-4-5 INJECTOR 4Preconditions for DTCs
^ If an injector circuit is short circuited to ground/voltage or if there is a break in the circuit, the ECM interprets this as a fault and sets the DTC for the relevant injector.
Substitute values
^ Idle air trim inhibited.
^ Fuel trim inhibited.
Fault sources
^ Signal too high:
- Signal lead short circuited to voltage.
- Defective injector.
^ Signal too low:
- Signal lead short circuited to ground.
- Break in signal or voltage lead.
- Contact resistance in connections.
- Defective injector.
Fault symptom
^ The engine does not fire on all cylinders. Sometimes, the engine does not start up.