P1125
DTC P1125
CIRCUIT DESCRIPTION
The accelerator pedal position (APP) sensor 1 and the APP sensor 2 are potentiometer type sensors, each with the following circuits:
- A 5-volt reference circuit
- A low reference circuit
- A signal circuit
The control module provides the APP sensors with a 5-volt reference circuit and a low reference circuit. The APP sensors then provide the control module signal voltages proportional to pedal movement. The APP sensor 1 signal voltage is low at rest and increases as the pedal is depressed. The APP sensor 2 signal voltage is low at rest and increases as the pedal is depressed. When the control module detects that the APP sensor 1 and the APP sensor 2 signal circuits are out of correlation with each other, DTC P1125 sets.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P1125 Accelerator Pedal Position (APP) System
CONDITIONS FOR RUNNING THE DTC
- DTC P2108 or U0107 is not set.
- The ignition is in the Crank or Run position.
- The ignition voltage is more than 5.23 volts.
- DTC P1125 runs continuously once the above conditions are met.
CONDITIONS FOR SETTING THE DTC
- Both APP sensors are out of range. OR
- Both APP sensors disagree.OR
- One APP sensor is out of range and the other APP sensor disagrees.
- One of the above conditions is present for more than 0.019 second.
ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame and/or the Failure Records.
- The control module commands the TAC system to operate in the Reduced Engine Power mode.
- A message center or an indicator displays Reduced Engine Power.
- Under certain conditions the control module commands the engine OFF.
CONDITIONS FOR CLEARING THE MIL/DTC
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.
TEST
