Check engine light stays on

Biggie88

My Mazda 5 2009 engine light stays on in replace sensor and still on dealer says I need engine harness and other parts but they are expensive. The car runs fine with light, but can't pass inspection.

stever

What do the codes say? Was it an oxygen sensor that you replaced?

aguilapluma

I replaced both down & upstream o2 sensors w/same results, trying to find mech to clear cel.