C05C7Brake Pressure Sensor F Circuit High
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Here the voltage of pressure sensor F rises above the top of its measuring range. With the common pull-down input, Denso explains that a lost sensor ground lifts the output past 4.7 V, which lies in the upper fault band; a short of the signal to a voltage source has the same effect. Industrial sensors such as the Honeywell MIP series deliberately park their output near 97.5 % of supply to signal an internal fault or overpressure. Saab/GM detects a short to voltage on the brake pressure signal or reference within 0.1 s. No carmaker documents C05C7 for sensor F. Check the ground wire first, then insulation of the signal line. C05C6 is the low counterpart, C05C5 the in-range plausibility fault.
- What you may notice
- ABS/ESC lamp on, stability functions switched off
- Live data shows implausibly high brake pressure with pedal released
- Likely causes
- LikelyOpen or high-resistance sensor ground
- PossibleSignal wire shorted to a voltage source
- PossibleSensor F reporting an internal fault at the upper rail
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.