P2125
DTC P2125
CIRCUIT DESCRIPTION
The accelerator pedal position (APP) sensor 2 is a potentiometer type sensor with the following 3 circuits:
- A 5-Volt reference circuit
- A low reference circuit
- A signal circuit
The control module provides the APP sensor a 5-Volt reference circuit and a low reference circuit. The APP sensor then provides the control module a signal voltage proportional to pedal movement. 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 2 signal or the APP sensor 5-Volt reference voltage is outside the predetermined range, DTC P2125 sets.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P2125 Accelerator Pedal Position (APP) Sensor 2 Circuit
CONDITIONS FOR RUNNING THE DTC
- DTC P2107 is not set.
- The ignition is ON.
- The ignition voltage is more than 5.23 volts.
CONDITIONS FOR SETTING THE DTC
- The APP sensor 2 voltage is less than 0.235 volt or more than 4.487 volts. OR
- The APP sensor 2 5-Volt reference voltage is less than 4.54 volts or more than 5.21 volts.
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 DTC
- 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 non-emission related diagnostic.
- Clear the DTC with a scan tool.
TEST
