Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means the car's computer thinks the brakes on the back wheels aren't working well because there's not enough pressure to make them stop the car.
The vehicle's electronic control unit (ECU) has detected that the pressure in the brake circuit for the rear axle is below the expected level.
The C10A5 code indicates a problem with the hydraulic pressure in the rear axle brake circuit. This could be due to a leak, air in the brake lines, or a malfunctioning brake pressure sensor. The brake system relies on hydraulic pressure to function correctly, and any drop in pressure can lead to reduced braking performance.
• Reduced braking efficiency
• Brake warning light on dashboard
• Spongy brake pedal
• Brake fluid leak
• Air in the brake lines
• Faulty brake pressure sensor
Brake Fluid: A hydraulic fluid used in brake systems to transfer force into pressure.
Brake Pressure Sensor: A sensor that measures the pressure within the brake system to ensure proper operation.
• Check brake fluid level and inspect for leaks.
• Bleed the brake system to remove any air.
• Test the brake pressure sensor for proper operation.
• Repair any identified brake fluid leaks.
• Bleed the brakes to ensure no air is in the system.
• Replace the brake pressure sensor if faulty.
• Brake fluid
• Brake bleeder kit
• Multimeter
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Ram 1500
• Regularly check brake fluid levels.
• Inspect brake lines for wear and tear.
• Schedule routine brake system maintenance.
Brake System Issue
• Do not drive the vehicle until the issue is fixed, as it can be unsafe.
• Have a professional mechanic diagnose and repair the problem.
Brake system components may be covered under the vehicle's basic warranty if the vehicle is still within the warranty period.
This code has been associated with vehicles that have experienced brake fluid leaks or issues with brake pressure sensors.
High – Brake issues can severely impact vehicle safety and should be addressed immediately.
Driving with impaired brakes is illegal and poses a significant safety risk.
• Vehicle parked on a level surface
• Engine off and cool
The rear axle brake circuit components are located near the rear wheels of the vehicle.
Q: Can I drive my car with this code?
A: No, driving with impaired brakes is unsafe. Have the issue fixed immediately.
Q: How often should I check my brake fluid?
A: Check your brake fluid at least once a month or during regular vehicle maintenance.
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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