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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 753 (Engine Controls - Powertrain DTC Charts & Descriptions - CNG, Flex-Fuel & Gasoline) >> Diagnostic Trouble Code (DTC) Charts >> P1235 - Fuel Pump Control Out Of Range

P1235 - Fuel Pump Control Out Of Range

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P1235 - FUEL PUMP CONTROL OUT OF RANGE

Description:  The DTC indicates the FPDM detected an invalid or missing FP circuit signal from the PCM. The FPDM sends a message to the PCM through the FPM circuit, indicating this failure was detected. The PCM sets the DTC when the message is received.
  • NOTE: For LS6/LS8 and Thunderbird, the FPDM functions are incorporated in the Rear Electronics Module (REM). Also, the REM does not use an FPM circuit. Diagnostic information is sent on the communication link.
Possible Causes: 
  • FP circuit open or shorted.
  • ETC system concern (check for ETC DTCs).
  • Damaged FPDM.
  • Damaged PCM.
Diagnostic Aids: 
  • The FPDM sends a 25% duty cycle (250 ms ON, 750 ms OFF) through the FPM circuit to the PCM while the fault is being detected by the FPDM. If the fault is no longer detected, the PDM returns to sending an all OK (50% duty cycle) message to the PCM.
  • For ETC applications, check if ETC DTC P2105 is present. An ETC system concern could cause P1235, and should be diagnosed first.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to KB: Fuel Pump Driver Module STEP 23
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