OBDII Code List

C012E BUICK - Hydraulic Brake Boost Pressure Loss

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Brake Pressure Modulator
  • Brake Pressure Modulator harness is open or shorted
  • Brake Pressure Modulator circuit poor electrical connection

Tech notes

DTC C012E 00 Hydraulic Brake Boost Pressure Loss Malfunction
DTC C012E 12 Hydraulic Brake Boost Pressure Loss Low Input

Possible symptoms

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

C012e Buick Description

The boost pressure valve is internal to the brake pressure modulator. The Electronic Brake Control Module (EBCM) monitors the boost pressure. The boost valve controls the amount of hydraulic boost required during braking or a vehicle stability event.

When a boost fault condition is detected, the boost control will continue applying as much pressure as possible until boost pressure is no longer available.

OBDII Code C012e Buick - Hydraulic Brake Boost Pressure Loss -

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