P2123

DTC P2123 Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

Circuit Description

The accelerator pedal position (APP) sensor is mounted on the accelerator pedal control assembly. The sensor is made up of two individual sensors within one housing. The ECM uses the APP sensors to determine the amount of acceleration or deceleration that is desired. The APP sensor 1 has the following circuits.

^ 5 volts reference circuit
^ Low reference circuit
^ APP sensor 1 signal circuit

The APP sensor 1 provides a signal to the ECM on the signal circuit which is relative to the position changes of the accelerator pedal angle. If the ECM detects an excessively high signal voltage this DTC will set.

Condition for Running the DTC

^ DTCs P0642 and P0643 are not set.
^ The ignition switch is ON.

Condition for Setting the DTC

^ The ECM detects that the APP sensor 1 signal voltage is more than 4.75 volts.

Action Taken When the DTC Sets

^ The ECM illuminates the SVS lamp when the diagnostic runs and fails. Refer to DTC Type Definitions for Action Taken When the DTC Sets - Type C.

Condition for Clearing the DTC

^ Refer to DTC Type Definitions for Condition for Clearing the SVS Lamp DTC - Type C.

Diagnostic Aids

^ If an intermittent condition is suspected refer to Intermittent Conditions in this section.

Circuit/System Testing DTC P2123