Chassis, generic

C053D Brake Pressure Sensor A Range/Performance

Check engine lightOn
EmissionsNot relevant
Drive cycleRequired
Limp modePossible

The brake pressure sensor A signal is electrically present, but its value does not fit the braking situation. GM stores C053D in the brake system control module, calling it a circuit performance fault: on 2019 Silverado/Sierra 1500 drivers got a hard pedal plus the Service Brake Assist warning (PIT5638), and bulletin 20-NA-073 lists it among faults that drop the brake-by-wire system into its mechanical Push-Thru mode; the fix is BSCM software. Stellantis logs it as Brake Pressure Sensor 1 Performance in the PCM of the 2023 Grand Cherokee, where the PCM compares the sensor with the pedal position sensor inside the BSCM; remedy is a PCM flash or an ABS initialization. Mitsubishi maps C106C-02 to it (Outlander PHEV 2023, ASC lamp plus MIL after two trips).

Likely causes

Brake or engine control software with an over-sensitive plausibility check (several bulletins)
Pressure and pedal sensors not initialized after module or hydraulic unit replacement
Air in the brake lines distorting the pressure build-up
Stop-light switch or pedal sensor delivering a mismatching reference
Drifting pressure sensor in the hydraulic unit

Symptoms

  • Brake assist or stability control warning shown
  • Brake pedal hard or travelling further than usual
  • Check-engine lamp on some models

Repair estimate

DifficultyHardWorkshop job
Parts and labour€80–1,800
Time0.3–3 h

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

Parts involved

brake pressure sensor a

Related codes

C053EC053FC0540C0541C0044C058E

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.