Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is saying that the power going to the pump that helps with braking is too low. It's like when a toy doesn't work well because the batteries are weak.
The ABS (Anti-lock Braking System) pump motor requires a specific voltage to operate correctly. This code indicates that the voltage supplied to the motor is lower than expected.
The C055B code is triggered when the ABS control module detects that the voltage supply to the ABS pump motor is below the specified threshold. This can affect the operation of the ABS system, potentially leading to reduced braking performance.
• ABS warning light on the dashboard
• Reduced braking performance
• ABS system not functioning properly
• Faulty ABS pump motor
• Damaged wiring or connectors
• Blown fuse related to the ABS pump motor
ABS: Anti-lock Braking System
OBD-II: On-Board Diagnostics II
• Check for any blown fuses related to the ABS system.
• Inspect the wiring and connectors for damage or corrosion.
• Test the voltage at the ABS pump motor.
• Replace any blown fuses.
• Repair or replace damaged wiring or connectors.
• Replace the ABS pump motor if faulty.
• Multimeter
• OBD-II scanner
• Basic hand tools
$150 - $500
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect and maintain the vehicle's electrical system.
• Ensure all fuses are in good condition.
• Keep connectors and wiring free from corrosion.
Electrical Issue
• Do not ignore the ABS warning light.
• Have the vehicle inspected by a professional if unsure.
• Avoid driving in conditions that require heavy braking until repaired.
Check with the vehicle manufacturer for specific warranty coverage related to the ABS system.
This code has been associated with electrical issues in ABS systems, particularly in vehicles with known wiring harness vulnerabilities.
High – This issue can affect the vehicle's braking performance, making it a safety concern.
Driving with a malfunctioning ABS system can be dangerous and may not comply with vehicle safety regulations.
• Vehicle ignition in the ON position
• ABS system activated
The ABS pump motor is usually located near the vehicle's brake master cylinder or integrated into the ABS module assembly.
Q: Can I drive with a C055B code?
A: It's not recommended as the ABS system may not function properly, affecting braking performance.
Q: How do I reset the ABS warning light?
A: Fix the underlying issue first, then clear the code with an OBD-II scanner.
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.
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Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.
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Universal · Drive-on ramps
Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
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