Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the sensor that helps the car know how hard you're pressing the brake pedal.
The brake booster pressure sensor measures the pressure inside the brake booster to ensure proper brake function.
The C0047 code is triggered when the brake booster pressure sensor sends a signal to the vehicle's computer that is outside of the expected range. This sensor is crucial for the proper operation of the brake booster, which helps reduce the effort needed to apply the brakes.
• Increased brake pedal effort
• Brake warning light on
• Reduced braking performance
• Faulty brake booster pressure sensor
• Damaged wiring or connectors
• Faulty brake booster
Brake Booster: A device that amplifies the force applied to the brake pedal.
Sensor: A device that detects or measures a physical property and records, indicates, or otherwise responds to it.
• Use an OBD-II scanner to confirm the code.
• Inspect the brake booster pressure sensor and its wiring.
• Test the sensor's voltage and resistance.
• Replace the brake booster pressure sensor.
• Repair or replace damaged wiring or connectors.
• Replace the brake booster if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect brake system components.
• Ensure proper maintenance of brake fluid levels.
• Address any brake warning lights promptly.
Sensor Issue
• Avoid driving the vehicle until the issue is resolved.
• Have a professional mechanic inspect the brake system.
Check with the vehicle manufacturer for warranty coverage on brake components.
This code has been associated with brake system issues in various vehicle models, often due to sensor failure or wiring problems.
High – Brake system issues can affect vehicle safety.
Driving with a malfunctioning brake system can be dangerous and may violate traffic safety laws.
• Vehicle ignition in the 'on' position.
• Brake pedal applied.
The brake booster pressure sensor is typically located near the brake booster, which is usually found on the driver's side of the engine compartment.
Q: Can I drive with a C0047 code?
A: It's not recommended to drive with this code as it may affect braking performance.
Q: How do I reset the C0047 code?
A: After repairs, use an OBD-II scanner to clear the code, but ensure the issue is resolved first.
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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