P1899

Tests 1 - 3:

Tests 4 - 7:

SYMPTOM
P1899-TRS PERFORMANCE

WHEN MONITORED
Continuously with the transmission in Park, Neutral, or Drive and NOT in Limp-in mode.

SET CONDITION
This code Will set if the PCM detects an incorrect Park/Neutral switch state for a given mode of vehicle operation.

POSSIBLE CAUSES
- Intermittent TRS sense circuit
- P/N switch
- Park/neutral sense circuit open
- Park/neutral sense circuit shorted to ground
- Powertrain control module