Powertrain
generic / SAE
P0850
Park/Neutral Switch Input Circuit
The ECU detects implausible park/neutral position switch input. The signal does not match the gear lever position reported by the TCM.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number8 / 50
Possible causes
- PNP switch failed high
- Switch misaligned medium
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 120–500 €
- Estimated time: 0.5–2.5 h
- Component: park neutral switch
- Component: wiring harness
- Component: tcm
- MIL / check engine light
Sources
References
sae:J2012