DTC P1612 Cadillac
Lost Communication With Fuel Pump Control Module B
Lost Communication With Fuel Pump Control Module B
Description
The powertrain control module (PCM) monitors the fuel pump monitor 2 (FPM2) circuit for the presence of a duty cycled signal. If the FPM2 circuit is fixed at a low or high voltage, the PCM begins to increment a counter. The test fails when the PCM is still not detecting a duty cycled signal on the FPM2 circuit after a calibrated amount of time.
Cause and Solution
FPM2 circuit open or short to groundFPM2 circuit short to voltageVPWR fuel circuit openPWRGND circuit openDamaged fuel pump control module relay
Video Guide
Diagnostic Info
- DTC Code: P1612
- Brand: Cadillac