C0574 code meaning
Brake Pressure Sensor C Circuit Range/Performance
Chassis system Generic code C05xx codes Check engine light
What C0574 means
Here the sensor C signal is electrically within limits but does not make sense. GM's 2016–2019 hybrid brake modules learn the zero point while the pedal is released and set C0574 if the offset exceeds ±1,500 kPa; to confirm a repair the car is driven at about 37 mph for 5 s without braking. A 2019 EBCM compares its two secondary circuit pressure signals with each other and with pedal travel (difference above 5 bar), checks each learned offset (above 10 bar) and catches erratic readings within 80 ms. The 2023 and 2025 tables allow an offset of 12 bar. All are Type A with MIL. A Lucas/ZF patent shows why several sensors are needed: only a comparison of three or more at a shared pressure tells which one has drifted.
C0574 at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 4 hours
- Clears after repairAfter a drive cycle
Symptoms of C0574
- Check engine light and ABS or stability lamp (GM)
- Uneven or changed braking feel when regeneration blends in
- Code returns after clearing once the car has been driven
Common causes of C0574
- Most likelyPressure sensor zero point drifted with age or temperature
- PossibleResidual pressure while learning, e.g. dragging pedal or sticking valve
- PossiblePoor sensor ground shifting the signal level
- Less likelySensor values not relearned after replacing the brake module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Brake pressure sensor cBrake control module
What each part of C0574 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 74 | The exact fault in that area. |
What to do next
- Note C0574 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 C0574
What does C0574 mean?
C0574 means "Brake Pressure Sensor C Circuit Range/Performance". Here the sensor C signal is electrically within limits but does not make sense. It is a generic code, so it means the same on every make.
Is it safe to drive with C0574?
Drive gently and only to a workshop. With C0574 the car can go into limp mode (reduced power) to protect itself.
Will C0574 fail an emissions test?
C0574 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 C0574 to fix?
Difficulty: hard. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will C0574 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.