Chassis, generic

C0576 Brake Pressure Sensor D Circuit High

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C0576 is set when the signal of brake pressure sensor D sits too high. GM's 2016–2019 hybrid brake tables, where D is the left rear wheel pressure sensor, compare the signal line against the supply: a level over 3.3 V lasting 0.1 s at ignition on stores the code, Type A with MIL after one trip. A short to the 5 V reference or to battery voltage and a broken sensor ground are the usual reasons; an internally damaged sensor can also report full scale. A Bosch trainer describes such a sensor as 5 V supplied, giving under 1 V with the brakes released and rising with pressure, which makes a high reading at rest easy to spot on live data. The module then no longer trusts the value, and regenerative blending and ABS/ESC are restricted.

Likely causes

Signal line shorted to the 5 V reference or to battery voltage
Open sensor ground, signal floats high
Sensor internally damaged, reports maximum pressure

Symptoms

  • Check engine light and brake warnings (GM hybrids)
  • High rear pressure shown with the pedal released
  • Less regenerative braking, ABS/ESC restricted

Repair estimate

DifficultyHardWorkshop job
Parts and labour€60–2,500
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

brake pressure sensor dsensor wiringbrake control module

Related codes

C0575C0577C0578C059DC0572

References: gsi.ext.gm.com, gsi.ext.gm.com, techtips.ie.