P1125 Possible Causes
- Faulty accelerator pedal position sensor
- Accelerator pedal position sensor harness is open or shorted
- Poor electrical connection in accelerator pedal position sensor circuit
How to Fix Code P1125?
Start by checking the “Possible Causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
Engine light on (or engine service soon light)
P1125 Meaning
The accelerator pedal position (APP) sensor 1 and 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 with signal voltages proportional to pedal movement. The APP sensor 1 signal voltage is low at rest and increases when the pedal is depressed.
The APP sensor 2 signal voltage is low at rest and increases when the pedal is depressed. When the control module detects that the APP sensor 1 and APP sensor 2 signal circuits don’t correlate with each other, DTC P1125 is set.