To plug or not to plug.

The ? is I have a 91 mm 2.4 with a check engine light on is there a plug on the truck for a diagnostic tool...Or is there another way to figure out why the light is on.

You need an analog voltmeter. I believe you put the ground on the bottom right pin and positive on top left. Short pause all the way to right means 10, short pause means digit

So long short short short would mean 13.



For a look at some of the fault codes.

thanx man I will check into it.