OBD
P081B
Starter Disable Circuit High
What it means
P081B means Starter Disable Circuit High.
Check these first
- A short to power in the starter disable circuit
- A faulty starter disable relay
- Corrosion at the starter disable connector
- A faulty ignition switch
- A faulty ECM or PCM
What to do next
- Read the starter disable circuit state on a scan tool
- Test the starter disable circuit for a short to power
- Check the starter disable relay and connector
- Check the ignition switch and starter
- Replace the relay if the circuit tests good
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.