P1235 MERCURY Possible Causes
- Faulty Fuel Pump Driver Module (FPDM)
- FPDM harness is open or shorted
- Poor electrical connection in FPDM circuit
- Faulty Powertrain Control Module (PCM)
How to Fix Code P1235 MERCURY?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or engine service warning light soon)
P1235 MERCURY Meaning
Code P1235 indicates that the Fuel Pump Driver Module (FPDM) has detected an invalid or missing fuel pump (FP) circuit signal from the Powertrain Control Module (PCM). The FPDM sends a message to the PCM via the FPM circuit, indicating that this fault has been detected. The PCM sets the DTC when the message is received.