Riviera V6-231 3.8L VIN L SFI (1991)
Transmission Position Switch/Sensor: Description and Operation
Park/Neutral Safety Switch
The PARK/NEUTRAL (P/N) switch indicates to the ECM/PCM when the transmission is in park, neutral or drive. This information is used for Torque
Converter Clutch (TCC), EGR, timing, canister purge and IAC valve information. Disconnecting the P/N switch could cause improper idle speed, cruise
control, timing, or TCC operation.
