C05C5Brake Pressure Sensor F Circuit Range/Performance
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Pressure sensor F delivers a voltage inside the electrical window, yet the value does not fit the braking situation: wrong offset at rest, a reading that disagrees with deceleration or the brake switch, or a pressure that does not match pedal travel. No manufacturer documents C05C5 for sensor F. GM shows the method on other channels: the XT4 brake module flags pressure sensor A when its offset exceeds 12 bar with the pedal released, and Saab/GM treats a pressure signal that conflicts with vehicle deceleration as not plausible. Bosch compares measured pressure against a stored curve over input rod stroke. Unlike C05C6 and C05C7, the wiring is usually intact; suspect the sensor, its calibration or the hydraulics.
- What you may notice
- ABS/ESC warning lamp, stability control off
- Unusual pedal feel or uneven braking assistance
- Likely causes
- LikelyPressure sensor F drifting or with offset out of tolerance
- PossibleCalibration not matching after component replacement
- PossibleAir in the system or hydraulic fault falsifying pressure
- RareIncreased contact resistance at the sensor connector
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.