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 has detected a problem with the brake pressure sensor. It's like a sensor that tells the car how hard you're pressing the brakes isn't working right.
The brake pressure sensor monitors the pressure applied to the brake system. If there's an issue with the sensor or its circuit, it can affect braking performance.
The C0635 code indicates an open or faulty circuit in the brake pressure sensor 'G'. This sensor is responsible for measuring the hydraulic pressure in the braking system and sending the data to the vehicle's control module. An open circuit could mean a disconnected wire, a faulty sensor, or a problem with the control module.
• ABS warning light on
• Reduced braking performance
• Brake pedal feels different
• Faulty brake pressure sensor
• Damaged wiring or connectors
• Faulty control module
ABS: Anti-lock Braking System
OBD-II: On-Board Diagnostics, second generation
• Inspect the brake pressure sensor and its wiring for damage.
• Check the connectors for corrosion or looseness.
• Use a multimeter to test the sensor's circuit for continuity.
• Replace the brake pressure sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the control module if necessary.
• Multimeter
• OBD-II scanner
• Wrench set
$150 - $500
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect brake system components.
• Ensure proper maintenance of electrical connections.
• Avoid driving through deep water which may damage sensors.
Sensor Issue
• Do not ignore the ABS warning light.
• Have the brake system checked by a professional if you notice any changes in braking performance.
Check with the vehicle manufacturer for warranty coverage on brake system components.
This code has been associated with issues in vehicles with advanced braking systems, particularly in models with electronic brake distribution.
High – Brake system issues can affect vehicle safety and should be addressed promptly.
Driving with a malfunctioning brake system can be dangerous and may not comply with vehicle safety regulations.
• Vehicle stationary
• Engine running
The brake pressure sensor is typically located near the master cylinder or integrated within the ABS module.
Q: Can I drive with a C0635 code?
A: It's not recommended to drive with a brake system issue, as it can affect your ability to stop the vehicle safely.
Q: How can I reset the ABS warning light?
A: Fixing the underlying issue will usually reset the light. If not, an OBD-II scanner can be used to clear the code.
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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