C0543Brake Pressure Sensor B Circuit High
- Generic OBD-II code · Chassis
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- Here the signal of brake pressure sensor B sits above the top of its permitted range, which points to a signal wire touching the 5-V reference or battery voltage, an open sensor ground, or a sensor that has failed high. Stellantis is the one maker naming the code publicly: bulletins covering the stop-start Cherokee of model year 2019 with the 3.2-litre V6 list Brake Pressure Sensor 2 Circuit High next to the matching low fault, logged in the engine control module and cleared up by new PCM software (18-023-19, 18-077-22). For the electrical threshold, a Saab 9-5 brake module flags readings above 4.75 V held for 0.1 s. Unlike C0541 this is a pure voltage fault; C0542 is the low counterpart and C0544 the open circuit.
- What you may notice
- Check-engine lamp on
- Stop-start or brake-related assistance not working
- Likely causes
- LikelySignal wire shorted to reference or battery voltage
- PossibleSensor ground open or high resistance
- PossibleEngine control software fault (Jeep Cherokee 2019 bulletins)
- RareSensor failed with permanently high output
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.