C05C7 code meaning
Brake Pressure Sensor F Circuit High
What C05C7 means
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.
C05C7 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C05C7
- ABS/ESC lamp on, stability functions switched off
- Live data shows implausibly high brake pressure with pedal released
Common causes of C05C7
- Most likelyOpen or high-resistance sensor ground
- PossibleSignal wire shorted to a voltage source
- PossibleSensor F reporting an internal fault at the upper rail
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Brake pressure sensor fSensor wiring
What each part of C05C7 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| C7 | The exact fault in that area. |
What to do next
- Note C05C7 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about C05C7
What does C05C7 mean?
C05C7 means "Brake Pressure Sensor F Circuit High". Here the voltage of pressure sensor F rises above the top of its measuring range. It is a generic code, so it means the same on every make.
Is it safe to drive with C05C7?
Drive gently and only to a workshop. With C05C7 the car can go into limp mode (reduced power) to protect itself.
Will C05C7 fail an emissions test?
C05C7 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is C05C7 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will C05C7 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.