C0578Brake Pressure Sensor D Circuit Range/Performance
- Generic OBD-II code · Chassis
- Turns on the check-engine light
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- For sensor D the range/performance check targets a signal that is electrically fine but implausible. In GM's 2016–2019 hybrid brake modules, where D measures left rear brake pressure, the zero offset is learned while the car is being driven above about 4.5 mph with the brake released and the hydraulic pump idle; an offset beyond ±1,500 kPa sets C0578 at once, Type A with MIL. To prove the repair GM asks for driving at roughly 37 mph for at least 5 s. Wheel pressure sensors can also be checked against each other when valves connect them to one common pressure, a method described in a Lucas/ZF patent that singles out the drifting sensor and its error. Likely causes are sensor drift, trapped pressure in the rear circuit or a ground offset.
- What you may notice
- Check engine light and brake warnings (GM hybrids)
- Rear brake pressure shown although no brake is applied
- Code sets again after a short drive
- Likely causes
- LikelyZero point of sensor D drifted
- PossiblePressure trapped in the rear circuit, e.g. sticking caliper or valve
- RareGround offset between sensor and brake module
- Repair
- Hard · Usually a job for a workshop.Typical cost: €60 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.