Code P1200: Injector Circuit Fault: Notes

PCM controls and monitors injector driver circuits. If any injector feed or control circuit malfunctions, code will set.

1. Ensures no faults exist in injector control and ignition feed wiring.
2. Checks for open or grounded injector feed circuit.
3. Checks for grounded injector drive circuit.
4. Checks for an open injector drive circuit.

Fig 1: Code P1200 Schematic (3.8L) Injector Circuit Fault

Fig 2: Code P1200 Diagnostic Flow Chart (3.8L) Injector Circuit Fault