Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car's computer is saying that a sensor that helps measure the position of a part in the braking system isn't getting enough power.
The vehicle's computer has detected that the voltage in the circuit for the Brake Master Cylinder Piston Position Sensor B is lower than expected.
The C05CE code is triggered when the Powertrain Control Module (PCM) detects a voltage level that is below the specified threshold in the circuit for the Brake Master Cylinder Piston Position Sensor B. This sensor helps monitor the position of the master cylinder piston, which is crucial for proper brake function.
• Illuminated check engine light
• Reduced braking performance
• Unusual brake pedal feel
• Faulty Brake Master Cylinder Piston Position Sensor B
• Wiring issues such as shorts or open circuits
• Corroded or damaged connectors
PCM: Powertrain Control Module, the vehicle's main computer
Brake Master Cylinder: A component that converts the force from the brake pedal into hydraulic pressure
• Perform a visual inspection of the sensor and its wiring.
• Use a multimeter to check the voltage and continuity in the circuit.
• Inspect and clean connectors for corrosion or damage.
• Replace the Brake Master Cylinder Piston Position Sensor B if faulty.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $300
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect brake system components.
• Ensure electrical connections are clean and secure.
• Perform routine vehicle maintenance.
Sensor Issue
• Avoid driving the vehicle 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 has been associated with issues in vehicles with advanced braking systems, particularly those with electronic brake control.
High – This code affects the braking system, which is critical for vehicle safety.
Driving with impaired brakes can be dangerous and may violate safety regulations.
• Vehicle parked on a level surface
• Engine off and ignition in the ON position
The Brake Master Cylinder Piston Position Sensor is typically located near the brake master cylinder under the hood.
Q: Can I drive with this code?
A: It's not recommended to drive with this code as it affects the braking system, which is crucial for safety.
Q: How can I prevent this code from appearing?
A: Regular maintenance and inspections of the brake system can help prevent this code.
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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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