DTC P1236: Fuel Pump Control Out Of Range
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
P1236 - FUEL PUMP CONTROL OUT OF RANGE
| Description: | This DTC indicates the fuel pump driver module 2 (FPDM2) detected an invalid or missing fuel pump (FP) circuit signal from the powertrain control module (PCM). The FPDM2 sends a message to the PCM through the fuel pump monitor (FPM2) circuit, indicating this concern is detected. The PCM sets the DTC when the message is received. | ||
| Possible Causes: |
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| Diagnostic Aids: | The FPDM2 sends a 25% duty cycle (250 ms on, 750 ms off) through the FPM2 circuit to the PCM while the concern is being detected by the FPDM2. If the concern is no longer detected, the FPDM2 returns to sending an all OK (50% duty cycle) message to the PCM. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to KB: Fuel Pump Driver Module STEP KB67. | ||