What are the possible causes of code P12A6?
- Faulty fuel pump driver module
- Fuel pump driver module harness is open or shorted
- Poor electrical connection in the fuel pump driver module circuit
- Faulty Engine Control Module (ECM)
How to repair code P12A6?
Start by checking the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
What are the possible symptoms of code P12A6?
- Engine light on (or Service Engine Soon warning light)
What does code P12A6 mean?
The Engine Control Module (ECM) supplies ignition voltage to the fuel pump control module whenever the engine starts or runs. The ECM activates the fuel pump driver control module as long as the engine starts or runs and the ignition system reference pulses are received. While this allows voltage reception, the fuel pump driver control module provides a variable voltage to the fuel tank fuel pump module to maintain the desired fuel rail pressure. The Diagnostic Trouble Code (DTC) will be set if the ECM’s fuel pump enable circuit status does not match the fuel pump enable circuit status detected by the fuel pump driver control module for more than 0.5 seconds.