P1575: Pedal Position Out of Self Test Range

P1575 is logged when the ECU runs its self-test routine on the accelerator pedal position sensor and finds the reading sits outside the acceptable range. Modern drive-by-wire systems rely on the pedal position sensor to translate your foot input into a throttle command, and the ECU checks sensor values at key-on against known good thresholds. If the value is too high or too low at that point in the sequence, it flags P1575.

The most likely causes are a pedal position sensor that has drifted out of calibration or is failing, a wiring fault in the sensor circuit such as a high-resistance connection or a short, a loose or corroded connector at the pedal assembly, or occasionally a sensor that has been disturbed or replaced without a proper relearn procedure being performed. Check the connector and wiring at the pedal assembly first, then use a scan tool to observe the sensor's output voltage live while slowly depressing the pedal to see if the signal tracks smoothly or drops out.

At medium severity, this fault may cause hesitation, reduced throttle response, or an engine warning light without an obvious driveability complaint in mild cases. In worse cases the vehicle may enter reduced power mode. Address it promptly, as a faulty pedal signal can cause unpredictable throttle behaviour. If the connector and wiring are clean, pedal position sensor replacement is the typical fix.