Chassis, generic

C0575 Brake Pressure Sensor D Circuit Low

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

Brake pressure sensor D is a further hydraulic pressure sensor whose position is set by the manufacturer. In GM's hybrid brake control modules of 2016–2019 it measures brake pressure at the left rear wheel, and C0575 is stored when its signal stays under 0.3 V for 0.1 s while the ignition is on, rated Type A with MIL after one trip. Without that value the module lacks the rear wheel pressure it uses to blend regenerative and friction braking. Older GM vehicles used the same number for something unrelated: the left front damper actuator circuit of the electronic suspension (Saab 9-5, and GM full-size trucks whose engine harness chafed on the vacuum pump pulley, PIT5307G). Typical causes are a short to ground, lost sensor supply or a failed sensor.

Likely causes

Signal line of sensor D shorted to ground
Sensor supply interrupted, output drops to near 0 V
Defective pressure sensor

Symptoms

  • Check engine light with brake or stability warning (GM hybrids)
  • Regenerative braking reduced, more friction braking
  • Rear pressure reading near zero even when braking

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

C0576C0577C0578C059DC0571

References: gsi.ext.gm.com, gsi.ext.gm.com, saabwisonline.com, static.nhtsa.gov.