P2138critical severityPowertrain
Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation
on 2016 Chevrolet Impala 3.6L V6 LFX · AWD
What this code means
The dual accelerator pedal position sensors report conflicting values.
Symptoms
- Limp mode
- No throttle response
- Check engine light
- Engine at idle only
Common causes
- Failed APP sensor
- Corroded pedal connector
- Wiring fault
- 5V reference issue
Diagnostic steps
- Check APP sensor D and E voltages
- Verify 5V reference
- Inspect pedal connector
Repair notes
Replace accelerator pedal assembly. Check shared 5V reference circuit.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1