P1249 GMC Possible Causes
- Faulty fuel injector
- Fuel injector harness is open or shorted
- Poor electrical connection in the fuel injector circuit
How is GMC Code P1249 Repaired?
Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or maintenance engine warning light soon)
P1249 GMC Meaning
The Engine Control Module (ECM) provides voltage to each fuel injector on the high voltage fuel injector supply circuits. The ECM powers each fuel injector by grounding the high voltage fuel injector control circuit. The ECM monitors the status of the high voltage fuel injector supply circuits and the high voltage fuel injector control circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injector or injectors are disabled.