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 car's computer is having trouble reading the temperature of a part that helps the brakes work. It's like when a thermometer doesn't give a steady reading.
The brake booster temperature sensor monitors the temperature of the brake booster. An intermittent or erratic signal indicates that the sensor is not providing a consistent reading.
The C05B7 code is set when the brake booster temperature sensor 'C' circuit provides an intermittent or erratic signal to the vehicle's control module. This could be due to wiring issues, a faulty sensor, or a problem with the control module itself.
• Warning light on the dashboard
• Inconsistent brake performance
• Possible brake system warning messages
• Faulty brake booster temperature sensor
• Wiring issues such as loose connections or damaged wires
• Malfunctioning control module
Brake Booster: A component that helps reduce the effort needed to apply the brakes.
Sensor: A device that detects or measures a physical property and records, indicates, or otherwise responds to it.
• Check for any stored codes and freeze frame data.
• Inspect the wiring and connectors related to the brake booster temperature sensor.
• Test the brake booster temperature sensor for proper operation.
• Replace the faulty brake booster temperature sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regularly inspect brake system components.
• Ensure connectors and wiring are secure and undamaged.
• Perform routine maintenance checks.
Sensor Issue
• Do not ignore the warning light; have the vehicle checked promptly.
• Avoid hard braking until the issue is resolved.
• Consult with a professional mechanic for accurate diagnosis.
Check with your vehicle manufacturer for specific warranty coverage related to brake system components.
This code is relatively uncommon but has been reported in vehicles with advanced brake systems.
Moderate – While the vehicle may still be drivable, brake performance could be affected. Prompt attention is recommended.
Ignoring brake-related issues can lead to reduced braking performance and increase the risk of accidents.
• Vehicle must be in a safe location.
• Engine should be off during initial inspections.
The brake booster temperature sensor is typically located near the brake booster assembly, which is usually found on the driver's side of the vehicle, near the firewall.
Q: Can I drive with the C05B7 code?
A: It's not recommended to drive with this code active, as it can affect braking performance.
Q: How can I reset the C05B7 code?
A: After repairs, use an OBD-II scanner to clear the code, but ensure the issue is resolved first.
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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