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 sensor that checks the pressure in the brake booster. It's like a thermometer showing a temperature that's too high, but for the brakes.
The brake booster pressure sensor is responsible for monitoring the pressure inside the brake booster. If the sensor detects a pressure reading that is too high, it triggers the C1018 code.
The C1018 code is set when the brake booster pressure sensor sends a signal to the vehicle's computer indicating that the pressure is higher than the expected range. This can be due to a malfunctioning sensor, wiring issues, or a problem within the brake booster itself.
• Illuminated check engine light
• Reduced braking performance
• Unusual brake pedal feel
• Faulty brake booster pressure sensor
• Wiring issues such as shorts or opens in the sensor circuit
• Malfunctioning brake booster
Brake Booster: A device that increases the force applied to the brake pedal, making it easier to stop the vehicle.
Sensor: A device that detects or measures a physical property and records, indicates, or otherwise responds to it.
• Inspect the brake booster pressure sensor and its wiring for damage.
• Use a multimeter to check the sensor's electrical output.
• Test the brake booster for proper operation.
• Replace the brake booster pressure sensor if faulty.
• Repair or replace damaged wiring in the sensor circuit.
• Replace the brake booster if it is malfunctioning.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Dodge Charger
• Chrysler 300
• Jeep Grand Cherokee
• Regularly inspect brake system components.
• Ensure proper maintenance of the brake booster.
• Check wiring connections during routine service.
Sensor Issue
• Do not ignore the check engine light; have the vehicle inspected.
• Avoid hard braking until the issue is resolved.
• Consult a professional mechanic if unsure about repairs.
Check with the vehicle manufacturer for warranty coverage on brake system components.
This code has been associated with vehicles using electronic brake systems that rely on sensors for monitoring performance.
Moderate – While the vehicle may still be drivable, reduced braking performance can be a safety concern.
Driving with impaired brakes can be dangerous. Address brake issues promptly to ensure vehicle safety.
• Vehicle must be in a safe and controlled environment.
• Ensure the ignition is in the 'on' position without starting the engine.
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, attached to the firewall.
Q: Can I drive with a C1018 code?
A: It's not recommended to drive with this code as it can affect braking performance.
Q: How do I reset the C1018 code?
A: After fixing the issue, use an OBD-II scanner to clear the code from the vehicle's computer.
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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