P05E4
Park Brake Sensor/Switch Circuit Low
Generic OBD-II
Common symptoms
What you'll notice
- Check and replace faulty park brake sensor/switch
- Inspect and repair any loose or damaged wiring connections related to the park brake sensor/switch circuit
- Adjust or replace the park brake switch if necessary
- Inspect and repair any faults in the park brake system, such as low fluid levels or malfunctions in the park brake mechanism
Common causes
Most likely first
- Faulty park brake sensor/switch
- Loose or damaged wiring in the park brake sensor/switch circuit
- Malfunctioning park brake sensor/switch
- Corrosion or debris on the park brake sensor/switch terminals
- Faulty connection or poor ground in the park brake sensor/switch circuit
How to diagnose & fix
Work through it in order
- Park brake warning light may illuminate on the dashboard
- Inability to disengage or engage the parking brake
- Malfunctioning of the electronic parking brake system
- Loss of power or acceleration while driving
- Difficulty starting the vehicle
Read & clear P05E4 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.