P25C7 code meaning
Brake Booster Temperature Sensor A Circuit High
Powertrain system Generic code P25xx codes Check engine light
What P25C7 means
P25C7 flags a sensor A signal that is too high; GM interprets it as the temperature line shorted to supply. In the EBCM part of table 23OBDG07 for the 2023 Corvette Z06 the voltage must exceed 3.27 V five consecutive times within 0.6 s with the ignition on, and the fault is Type B with two trips to the MIL. Tables 24OBDG07 and 25OBDG03A repeat these values. Beyond a real short, an open sensor or a broken ground can also pull the signal toward the top of the range on many sensor designs, so the wiring at the booster deserves a check before the unit is replaced. Its second sensor uses the slightly lower limit of 3.14 V and the chassis code C057A. P25C6 is the low-side counterpart.
P25C7 at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P25C7
- Check engine lamp after two trips
- Brake system warning message
- Reduced brake assistance possible
Common causes of P25C7
- Most likelySensor signal shorted to the supply line
- PossibleOpen sensor circuit or missing sensor ground
- PossibleTemperature sensor open internally
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Electric brake boosterTemperature sensorWiring harness
What each part of P25C7 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| C7 | The exact fault in that area. |
What to do next
- Note P25C7 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 P25C7
What does P25C7 mean?
P25C7 means "Brake Booster Temperature Sensor A Circuit High". P25C7 flags a sensor A signal that is too high; GM interprets it as the temperature line shorted to supply. It is a generic code, so it means the same on every make.
Is it safe to drive with P25C7?
Drive gently and only to a workshop. With P25C7 the car can go into limp mode (reduced power) to protect itself.
Will P25C7 fail an emissions test?
P25C7 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 P25C7 to fix?
Difficulty: workshop only. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P25C7 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.