Park Brake Sensor/Switch Circuit Range/Performance

Common symptoms

What you'll notice

• Check the park brake sensor/switch wiring for any loose or damaged connections.
• Inspect the park brake sensor/switch itself for any signs of damage or wear.
• Test the park brake sensor/switch with a multimeter to ensure it is functioning properly.
• Reset the car's computer system by disconnecting the battery for a few minutes and then reconnecting it.
• Consult the car's manual or a reliable automotive technician for further diagnostic and repair advice.

Common causes

Most likely first

1. Faulty or malfunctioning park brake sensor/switch
2. Loose or damaged wiring connections in the park brake sensor/switch circuit
3. Low brake fluid level or malfunctioning brake fluid level sensor
4. Worn out or damaged brake pads or shoes
5. Faulty or malfunctioning brake actuator or solenoid coil

How to diagnose & fix

Work through it in order

1. Park brake warning light on dashboard remains illuminated
2. Vehicle unable to start or engine won't turn over
3. Inability to disengage the parking brake
4. Unexpected engagement or disengagement of the park brake
5. Loss of power or acceleration while driving