DTC P159C GMC
Lost Communication With Fuel Pump Control Module
Lost Communication With Fuel Pump Control Module
Description
The Powertrain Control Module (PCM) monitors the Fuel Pump Monitor (FPM) circuit for the presence of a duty cycled signal. If the FPM 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 FPM circuit after a calibrated amount of time. Note: Check if the Inertia Fuel Shutoff (IFS) switch is tripped.
Cause and Solution
FPM circuit open or short to ground FPM circuit short to voltage VPWR fuel circuit open PWRGND circuit open Damaged Inertia Fuel Shutoff (IFS) switch (if equipped) Damaged fuel pump control module relay
Video Guide
Diagnostic Info
- DTC Code: P159C
- Brand: GMC