P1899 Park/Neutral Switch Stuck In Park or Gear

SYMPTOM
P-1899 P/N SWITCH STUCK IN PARK OR IN GEAR

WHEN MONITORED
With the Transmission in park, neutral, or drive and not in limp-in mode.

SET CONDITION
This code is set if the PCM detects an incorrect Park/Neutral Switch state for a given mode of Vehicle operation.

POSSIBLE CAUSES
- No possible causes remaining
- Powertrain control module defective
- P/N switch sense circuit shorted to ground
- P/N switch wiring harness intermittent defect
- P/N switch wiring harness observable defect
- Park/neutral switch defective
- Park/neutral switch sense circuit open
- Park/neutral switch stuck