Engine Error
P0850
Park/Neutral Switch Input Circuit
Severity
Medium
Symptoms
Vehicle won't crank, idle surges when shifting gears, harsh engagement
Common Causes
- Defective neutral safety switch
- Misaligned shift linkage
- Corrosion in switch connector
- Wiring harness damage
How to Fix
- 1 Replace park/neutral switch
- 2 Adjust transmission shift cable
- 3 Clean connector terminals
- 4 Repair damaged wiring
Estimated Repair Cost
USD
$80
–
$300
Switch adjustment: $80; Switch replacement: $150 - $300