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 something is taking too long to stop the brakes on the back left wheel of the car.
The code indicates that the hydraulic system is taking too long to release pressure in the left rear brake, which can affect braking performance.
The C001A code is triggered when the vehicle's electronic control unit (ECU) detects that the hydraulic release time for the left rear brake exceeds the manufacturer's specified threshold. This can be due to a malfunction in the brake system, such as a sticking caliper or a problem with the hydraulic lines.
• Increased stopping distance
• Brake pedal feels spongy
• Vehicle pulls to one side when braking
• Sticking brake caliper
• Faulty brake hose
• Contaminated brake fluid
Brake Caliper: A component that squeezes the brake pads against the rotor to slow down the vehicle.
Hydraulic System: A system that uses fluid to transfer force into pressure for braking.
• Inspect the left rear brake caliper for sticking or damage.
• Check the brake lines and hoses for leaks or blockages.
• Test the brake fluid for contamination or air bubbles.
• Replace or repair the sticking brake caliper.
• Replace damaged or leaking brake hoses.
• Flush and replace the brake fluid.
• Brake caliper tool
• Brake fluid tester
• Wrench set
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular brake system inspections
• Timely replacement of brake fluid
• Avoiding harsh braking
Brake System Issue
• Have your brakes checked regularly.
• Pay attention to any unusual noises or feelings when braking.
Brake components may be covered under the vehicle's powertrain or bumper-to-bumper warranty if within the warranty period.
This code has been associated with brake system issues in vehicles with older brake components or those exposed to harsh driving conditions.
High – Brake issues can significantly affect vehicle safety and should be addressed immediately.
Driving with brake issues can be dangerous and may lead to accidents. Ensure your vehicle's brakes are in good working order.
• Vehicle on a flat surface
• Brake system at operating temperature
The left rear brake caliper is located behind the left rear wheel, attached to the brake rotor.
Q: Can I drive with a C001A code?
A: It's not recommended to drive with this code as it indicates a brake system issue that can affect safety.
Q: How often should brake fluid be changed?
A: Brake fluid should typically be changed every 2 years or as recommended by the vehicle 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.
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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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