2010 Cadillac CTS Sedan AWD V6-3.0L Page 1840

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1840

DTC P2123

- Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

DTC P2127

- Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

DTC P2128

- Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage

DTC P2138

- Accelerator Pedal Position (APP) Sensor 1-2 Correlation

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The accelerator pedal assembly contains 2 accelerator pedal position (APP) sensors. The APP sensors are mounted to the accelerator pedal

assembly and are not serviceable. The APP sensors provide a signal voltage that changes relative to pedal position. The engine control module

(ECM) supplies each APP sensor with a 5-volt reference circuit, a low reference circuit, and a signal circuit.

Both the APP sensors 1 and 2 signal percentages increase as the pedal is depressed, from approximately 0 percent at rest to above 95 percent when

fully depressed.

Conditions for Running the DTC

P2122, P2123, P2127, or P2128

* DTC P06A3 or P0697 are not set.

* The ignition is ON or the engine is operating.

* The ignition voltage is greater than 6 volts.

* The ECM is not commanding reduced power.

* The DTCs run continuously when the above conditions are met.

P2138

* DTCs P06A3, P0697, P2122, P2123, P2127, or P2128 are not set.

* The ignition is ON or the engine is operating.