P05BF
Stop Start Mode Switch Circuit High
Generic OBD-II
Common symptoms
What you'll notice
- Check the wiring and connectors related to the stop start mode switch circuit.
- Inspect and replace the stop start mode switch if necessary.
- Ensure proper voltage supply to the stop start mode switch circuit.
- Scan for any other related error codes and address them accordingly.
- Consult the vehicle or motorcycle manufacturer's technical service bulletins for any known issues or recommended solutions related to the stop start mode switch circuit.
Common causes
Most likely first
- Faulty stop start mode switch
- Loose or corroded electrical connections related to the switch
- Wiring harness issues or damage
- Faulty engine control module (ECM)
- Malfunctioning stop start system components
How to diagnose & fix
Work through it in order
- Engine may not start or may have difficulty starting
- Engine may stall or shut off unexpectedly
- Poor acceleration or reduced power
- Malfunction indicator lamp (MIL) illuminates on the dashboard
- Transmission may not engage properly or may shift harshly
Read & clear P05BF yourself
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