Circuit Description

WARNING: This page is about a different car, the 1995 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

The Park/Neutral Position (PNP) switch sends a signal to ECM when transaxle is in neutral or park position. This signal is used for air-fuel correction and for idle speed control. Code is set under 2 conditions:

When 2 or more switches are on simultaneously for "N", "2" and "L" position.
ECM is receiving an ON signal from PNP switch when vehicle is being operated for more than 30 seconds at 44 MPH or more (1500-2500 RPM).

Possible causes are:

PNP switch short circuit.
PNP switch.
ECM.