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
