Hello,

I have a 99 Camry with 112,000 Miles and inspection coming up. P1780 code showing Park Neutral safety switch problem. Cleared code but came back at 101 miles.
Wiring looks good in trunk area, at wires along conduit.
There is a crimp repair on white wire in trunk, but looks secure. I guess previous owner had issue.
Cleaned connector on Neutral safety switch before clearing code.
All lights work correctly.
Car starts in park and neutral, but not in other gear settings.
No other error lights on except check engine light.

Here in Delaware, they will not pass inspection unless check engine light is out!

Thanks for any advice on this matter.

Ednort

 

The issue could be the switch.

The computer is sensing the switch is in two positions at once instead of just one.

Or

When the trans is a F or R gear, the computer is sensing it is in P or N.

Replace switch.

The trunk repair could be due to wire damage from flexing.