OBD-II code · Powertrain (generic)
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.
Is it safe to drive with P0850?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyPNP switch failed
- PossibleSwitch misaligned
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
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Park Neutral Switch, Wiring Harness, Tcm
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.