Chassis, generic

C0572 Brake Pressure Sensor C Circuit High

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C0572 marks the upper end of the same sensor C channel: the pressure signal is at or above its top limit. GM's 2016–2019 hybrid brake modules check the signal voltage against the supply voltage and set the code when the two are practically equal for 0.1 s. The 2019 EBCM uses more than 95.24 % of supply voltage and explicitly includes an open signal line, so GM has no separate open-circuit code for this sensor. In the 2023 and 2025 tables the SENT master cylinder sensor reporting its maximum of 30,000 kPa for 0.96 s triggers it. All variants are Type A with MIL. A short to the reference voltage is the usual wiring cause; since the module would otherwise see heavy braking that is not happening, it stops trusting the sensor and limits brake functions.

Likely causes

Signal line shorted to the 5 V reference or another supply
Open signal line pulled high by the module input (GM counts this here)
Pressure sensor reporting full scale because of an internal fault

Symptoms

  • Check engine light plus ABS or stability lamp (GM)
  • Scan tool shows high brake pressure with the pedal released
  • Brake assist and regenerative braking 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 csensor wiringbrake control module

Related codes

C0571C0573C0574C059CC053F

References: gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com, patents.google.com.