C0541Brake Pressure Sensor B Range/Performance
- Generic OBD-II code · Chassis
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- Brake pressure sensor B delivers a valid voltage, yet the value is implausible. Which sensor carries the letter B varies by maker. Bentley documents the code for the Continental GT/GTC (2018–2022) and Flying Spur (2020–2022): C054100 in the ESC unit J104 is labelled as a fault of the rear-left pressure sensor, adaptive cruise control becomes unavailable, and the repair is a new J104 because the sensor is built into it. Typical tests behind such a fault are described by Saab, whose 9-5 brake module rejects a pressure reading that does not match deceleration or the brake switch, and by a Honda patent that declares the sensor failed when pedal stroke grows but pressure does not. A Bosch patent adds an offset that has drifted too far. C0542 to C0544 are the electrical faults.
- What you may notice
- Adaptive cruise control unavailable
- ESC or ABS warning in the cluster
- Assistance functions such as brake assist reduced
- Likely causes
- LikelyPressure sensor inside the ESC hydraulic unit drifting or sluggish
- PossibleZero-point calibration not done after module or valve block replacement
- RareBrake light switch or pedal sensor giving a contradictory reference
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.