OBD
P0854
Drive Switch Input Circuit Low
What it means
P0854 means Drive Switch Input Circuit Low.
Where it lives
For P0854, the switch sits on the circuit this code reports. The description of P0854 reports a fault at the switch.
Check these first
- A short to ground in the drive switch input wire
- A drive switch stuck closed
- Water in the drive switch connector
- A poor drive switch ground
What to do next
- Read drive switch input voltage
- Test the input wire for a short to ground
- Check the drive switch ground
- Dry and reseat the drive switch connector
- Replace the switch if the signal stays low
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.