C0042Brake Pedal Position Sensor Circuit A
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Covers circuit A of the brake pedal position sensor, which reports how far the pedal is pressed rather than just on/off like a switch. The brake or stability module uses this analog signal for brake-by-wire assist, regenerative braking blending and precise stop-lamp and cruise control. The module sets the code for a signal outside the valid voltage range, an open or short, or a value that disagrees with the pedal switch or a second sensor channel. Chrysler documents C0042 on 2015-2017 Durango and Grand Cherokee alongside P0572, with the brake lamps remaining lit or cruise control failing to engage, and prescribes checking and relearning the pedal rest position. A fault can disable assist and cruise functions and set a warning lamp.
- What you may notice
- Brake lights stay on
- Cruise control will not set
- ABS or brake warning lamp on
- Likely causes
- LikelyPedal position sensor out of range
- PossiblePedal home position not learned
- RareHarness or connector fault
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.