P0120 Nissan - frontier

Question

I've already put sensor on 2 months ago and problem has returned , what do you suggest I do .

Answer 1

Hi there,

First, if you used an aftermarket part, it's a fairly good chance the part has failed. There are just some sensors I don't suggest using aftermarket, this is one of them.

If the sensor is good, then you will need to check the wiring. You can do some of the testing with a volt meter, and other is quicker and easier with a scan tool that can read live data.