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Code C05C2

Symptoms

• Brake warning light on the dashboard

• Reduced braking performance

• Unusual noise from the brake booster area

Common Causes

• Faulty brake booster motor

• Electrical short or open circuit in the motor wiring

• Excessive use of the brake system causing overheating

Glossary

Brake Booster: A device that increases the force applied to the brakes.

Over Temperature: Condition where a component exceeds its normal operating temperature.

Related Codes

• C05C1

• C05C3

Laymans terms

This code means that the car's system has detected that the motor helping the brakes is getting too hot. It's like when a toy motor gets too warm after running for too long.

Explanation

The code indicates that the brake booster motor, which assists in applying the brakes, is experiencing higher than normal temperatures.

Technical description

The C05C2 code is triggered when the vehicle's control module detects an over-temperature condition in the Brake Booster Motor A. This motor is part of the brake assist system that helps reduce the effort needed to apply the brakes. Excessive heat can indicate a malfunction or excessive use of the motor.

Diagnosis steps

• Check for any stored codes and clear them to see if C05C2 reappears.

• Inspect the brake booster motor and wiring for signs of damage or wear.

• Measure the motor's temperature to confirm overheating.

Repair procedures

• Replace the faulty brake booster motor.

• Repair or replace damaged wiring or connectors.

• Ensure proper brake system operation and avoid excessive use.

Tools required

• OBD-II scanner

• Multimeter

• Infrared thermometer

Estimated repair cost

$200 - $600

Difficulty level

Moderate

Commonly affected vehicles

• Toyota Camry

• Honda Accord

• Ford Fusion

Preventive measures

• Regularly inspect brake system components.

• Avoid riding the brakes excessively.

• Ensure proper brake fluid levels and quality.

Error code type

Brake System Issue

User experience recommendations

• Do not ignore the brake warning light.

• Have the brake system inspected by a professional if you notice any issues.

Warranty information

Check with the vehicle manufacturer for specific warranty coverage on brake components.

Historical data

This code has been associated with vehicles equipped with advanced brake assist systems, which have become more common in modern vehicles.

Urgency level

High – This issue can affect braking performance and should be addressed promptly.

Legal and safety notice

Driving with impaired brakes can be dangerous. It is important to address this issue to ensure vehicle safety.

Testing conditions

• Vehicle at operating temperature

• Normal driving conditions

Component location

The brake booster motor is typically located near the brake pedal assembly or in the engine bay, connected to the brake master cylinder.

FAQs

Q: Can I drive with a C05C2 code?
A: It's not recommended to drive with this code as it can affect your braking performance.

Q: What happens if I ignore this code?
A: Ignoring the code can lead to reduced braking efficiency and potentially unsafe driving conditions.

Last updated: Jun 9, 2026 • Source: internal database
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