Question

Lexus GX470 Code P0500 Speedo works properly, shifts a little funny, VSC and Check engine light are on but will reset after a few days. If I reset the computer, the lights come back on but will reset themselves after a few days. Engine MPH reading from OBd2 port is erratic or reads zero.
I understand that there are 2 sensors on the trans and one on each wheel.
Perhaps not related, but the GPS screen refresh rate is slow and erratic. the arrow always indicates up, but the screen is not always in the correct position.

Answer 1

Hi there

Normally when you have this code and the speedo is working like it should, the problem is the speedometer itself. It's not sending the speed signal to the computer.