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 is telling you the brake pads might be getting too thin and need to be checked or replaced soon.
The brake lining wear sensor monitors the thickness of the brake pads and alerts the driver when they are worn out.
The C004A code is set when the brake lining wear sensor detects that the brake pads have worn down to a level that requires attention. This sensor is typically part of the brake system and sends a signal to the vehicle's computer if the brake pads are too thin.
• Brake warning light on the dashboard
• Squealing noise when braking
• Reduced braking performance
• Worn out brake pads
• Faulty brake lining wear sensor
• Damaged wiring or connectors
Brake Pads: Components that press against the brake rotor to slow down or stop the vehicle.
Sensor: A device that detects and measures a physical property and records, indicates, or otherwise responds to it.
• Inspect the brake pads for wear.
• Check the brake lining wear sensor for damage.
• Inspect the wiring and connectors for any issues.
• Replace the worn brake pads.
• Replace or repair the brake lining wear sensor.
• Repair or replace damaged wiring or connectors.
• Brake pad gauge
• Multimeter
• Socket wrench set
$100 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford Fusion
• Regularly inspect brake pads for wear.
• Replace brake pads before they wear out completely.
• Ensure proper maintenance of the brake system.
Sensor Issue
• Have your brakes checked regularly.
• Listen for unusual noises when braking.
• Pay attention to dashboard warnings.
Check with your vehicle manufacturer for specific warranty coverage related to brake components.
This code has been used in vehicles with electronic brake wear sensors for many years to ensure timely maintenance of the braking system.
High – Brake system issues should be addressed immediately to ensure vehicle safety.
Driving with worn brake pads can be dangerous and may lead to accidents. Ensure timely repairs to comply with safety regulations.
• Vehicle parked on a level surface
• Ignition in the 'On' position
The brake lining wear sensor is typically located near the brake pads within the wheel assembly.
Q: What happens if I ignore the C004A code?
A: Ignoring this code can lead to reduced braking performance and potentially dangerous driving conditions.
Q: Can I drive with the C004A code?
A: It's not recommended to drive with this code active as it indicates a potential issue with the brake system.
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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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.
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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.
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