P127D Possible Causes
- Faulty fuel injector
- Fuel injector harness is open or shorted
- Poor electrical connection in fuel injector circuit
How is code P127D repaired?
Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or service engine soon warning light)
P127D Meaning
The Engine Control Module (ECM) monitors the fuel injector. The ECM sets the OBDII code when the fuel injector does not meet factory specifications.