DTC P1DB1 Dodge
Lost Communication With Fuel Pump Control Module A
Lost Communication With Fuel Pump Control Module A
Description
The 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. This DTC sets when the PCM is still not detecting a duty cycled signal on the FPM circuit after a calibrated amount of time.
Cause and Solution
FPM circuit open or short to groundFPM circuit short to voltageVPWR fuel circuit openGND circuit openDamaged inertia fuel shutoff (IFS) switch (if equipped)Damaged fuel pump control module relay
Diagnosis:
Check if the inertia fuel shutoff (IFS) switch is tripped.
Video Guide
Diagnostic Info
- DTC Code: P1DB1
- Brand: Dodge