Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the part of your car that helps with braking isn't working as it should. Imagine if your bike's brakes weren't squeezing the wheel properly; it's like that, but for your car.
The code C055F indicates a problem with the performance of the hydraulic unit in the Brake System Control Module (BSCM) or the Electronic Brake Boost Control (EBBC).
The BSCM/EBBC Hydraulic Unit is responsible for managing the pressure in the brake lines to ensure proper braking performance. When this unit does not perform as expected, it can affect the vehicle's braking efficiency and safety. The code C055F is triggered when the control module detects a deviation in the expected hydraulic pressure or performance.
• Reduced braking performance
• Brake warning light on the dashboard
• Unusual brake pedal feel
• Faulty hydraulic unit
• Damaged or leaking brake lines
• Faulty brake pressure sensor
BSCM: Brake System Control Module
EBBC: Electronic Brake Boost Control
Hydraulic Unit: A component that manages brake fluid pressure in the braking system
• Check for any visible leaks in the brake lines.
• Use a scan tool to read the brake system data.
• Inspect the hydraulic unit for any signs of damage or wear.
• Replace the faulty hydraulic unit.
• Repair or replace damaged brake lines.
• Replace the brake pressure sensor if faulty.
• OBD-II scanner
• Brake line wrench
• Hydraulic pressure tester
$300 - $800
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regular brake system inspections
• Timely replacement of brake fluid
• Avoiding aggressive braking
Brake System Performance
• Do not ignore the brake warning light.
• Get your brakes checked by a professional as soon as possible.
Check with your vehicle manufacturer; brake system components might be covered under warranty.
This code has been associated with vehicles equipped with advanced braking systems that utilize electronic control modules.
High – Brake system issues can compromise vehicle safety and should be addressed immediately.
Driving with a malfunctioning brake system can lead to accidents and is unsafe. It is important to have this issue diagnosed and repaired promptly.
• Vehicle stationary with engine running
• Brake pedal pressed
The hydraulic unit is typically located near the brake master cylinder or integrated within the ABS module.
Q: Can I drive with code C055F?
A: It is not recommended to drive with this code as it indicates a problem with your braking system, which can be unsafe.
Q: How often should I check my brake system?
A: It's recommended to have your brake system inspected at least once a year or as advised by your vehicle's manufacturer.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Chassis and ABS faults usually need a scanner that can read brake-system data directly.
View on Amazon
Universal · Torque wrench
Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.
Useful when wheel, hub, or suspension hardware needs correct reassembly torque.
View on Amazon
Universal · Drive-on ramps
Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
Helpful for safer access during underbody inspection work.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.