OBD
P091D
Gear Shift Position Circuit B High
What it means
P091D means Gear Shift Position Circuit B High.
Check these first
- An open in the gear shift position B ground
- A sensor B signal wire shorted to voltage
- A failed gear shift position sensor B
- A connector with a spread pin at sensor B
What to do next
- Read gear shift position B voltage on a scan tool
- Test the sensor B ground for an open
- Test the signal wire for a short to voltage
- Inspect the sensor B connector pins
- Replace the sensor if the circuit tests good
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.