Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC P1275: Accelerator Pedal Position Sensor 1 Circuit: Description
The accelerator pedal assembly contains two Accelerator Pedal Position (APP) sensors with two independent 5-volt supplies, two independent grounds, and two independent signal circuits that vary resistance according to changes in accelerator pedal position. The ECM measure the signal voltage from each APP sensor, which are reduced values of the ECM 5-volt references. As the accelerator pedal moves from the rest to full position, the voltage on APP sensor 1 signal increases from 0.94 to 4.25 volts, while the voltage on APP sensor 2 signal decreases from 4.55 to 2.90 volts. The ECM monitors each APP signal circuit for faults, as well as a performing comparison check between the sensor 1 and 2 signals. DTC P1275 will set if APP sensor 1 signal voltage at ECM is outside calibrated voltage value.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.