Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is having trouble understanding where the brake pedal is because the sensor that tells it is not working right.
The brake pedal position sensor helps the car's computer know how far the brake pedal is pressed. If there's an electrical issue or the sensor is faulty, the car may not get the correct information.
The C1066 code indicates a problem with the brake pedal position sensor circuit. This sensor is crucial for the vehicle's braking system, as it informs the control module of the pedal's position, which is essential for systems like ABS and traction control. A fault can arise from wiring issues, a defective sensor, or a problem within the control module itself.
• ABS warning light on
• Traction control light on
• Brake lights not working properly
• Faulty brake pedal position sensor
• Damaged or corroded wiring/connectors
• Faulty control module
OBD-II: On-Board Diagnostics, a standardized system in vehicles for self-diagnosing and reporting.
ABS: Anti-lock Braking System, a safety system that prevents wheels from locking up during braking.
• Check for any other related codes
• Inspect the wiring and connectors for damage or corrosion
• Test the brake pedal position sensor for proper operation
• Replace the brake pedal position sensor
• Repair or replace damaged wiring/connectors
• Reprogram or replace the control module if necessary
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and maintain brake system components
• Ensure connectors are clean and secure
• Avoid exposure to excessive moisture and dirt
Sensor Issue
• Do not ignore the warning lights on your dashboard
• Have your vehicle inspected by a professional if unsure
• Ensure regular maintenance checks to prevent such issues
Check with your vehicle manufacturer; sensor issues might be covered under the powertrain or emissions warranty.
C1066 is a relatively common code in vehicles with electronic brake systems, often associated with sensor wear or wiring issues over time.
Moderate – While the vehicle may still be drivable, braking performance could be compromised, affecting safety.
Driving with a compromised braking system can be dangerous. Always address brake-related issues promptly to ensure safety.
• Vehicle ignition on
• Brake pedal pressed
The brake pedal position sensor is typically located near the brake pedal assembly inside the vehicle cabin.
Q: Can I drive with a C1066 code?
A: It's not recommended to drive with a brake-related issue as it can affect your vehicle's safety systems.
Q: How do I reset the C1066 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, the problem may not be resolved.
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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