• Check Engine Light illuminated
• Decreased braking performance
• Unusual brake pedal feel
• Faulty brake booster pressure sensor
• Wiring issues such as short circuits or open circuits
• Defective ECM
ECM: Engine Control Module, the computer that controls engine functions.
Brake Booster: A device that uses vacuum pressure to help the driver apply force to the brakes.
• P0557
• P0559
Brake Booster Pressure Sensor Circuit High
This code means that the car's computer thinks the sensor that checks the pressure in the brake booster is getting too high of a signal. It's like when a video game controller sends too strong a signal to the game console.
The P0558 code is triggered when the Engine Control Module (ECM) detects a high voltage signal from the brake booster pressure sensor circuit.
The brake booster pressure sensor monitors the pressure inside the brake booster, which helps to amplify the force applied to the brake pedal. If the sensor sends a voltage signal to the ECM that is higher than the expected range, the P0558 code is set. This could be due to a faulty sensor, wiring issues, or a problem with the ECM itself.
• Use an OBD-II scanner to verify the code.
• Inspect the brake booster pressure sensor and its wiring for damage.
• Test the sensor's voltage and resistance with a multimeter.
• Replace the brake booster pressure sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect brake system components.
• Ensure wiring and connectors are secure and undamaged.
• Follow manufacturer maintenance schedules.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have your brakes checked by a professional if you notice any issues.
• Consider regular maintenance to prevent sensor issues.
Check with your vehicle manufacturer for specific warranty coverage related to brake system components.
The P0558 code has been reported in vehicles with aging brake systems or those with previous brake service issues.
Moderate – While the vehicle may still be drivable, decreased braking performance can be dangerous.
Driving with impaired brakes can be hazardous. Ensure your vehicle is safe to operate before driving.
• Vehicle at operating temperature
• Brake pedal applied
The brake booster pressure sensor is typically located on or near the brake booster unit, which is usually found on the driver's side of the engine compartment, near the firewall.
Q: Can I drive with a P0558 code?
A: It's not recommended to drive with a P0558 code, as it can affect braking performance, making it unsafe.
Q: How can I reset the P0558 code?
A: After fixing the issue, you can reset the code using an OBD-II scanner. However, if the problem isn't resolved, the code will likely return.
