Hi All, I failed E-check and Im getting poor mileage. I am getting about 80 miles less per tank. The first culprit is the o2 sensor which I replaced after failing the first time but then I failed again with the sames results. So it turns out after testing the new o2 sensor with a volt meter that it is faulty even though its new but is a universal part rather than OEM. I am failing the NOX at idle and at low speeds up 15 miles per hour. However, I am passing NOX at the high speed part of the test. I ordered the OEM O2 sensor and it will be here tomorrow but any other suggestions on what I should check out before heading back to the Smog check would be appreciated. I tested the water temp sensor its with in specs.
Thank you all... Charlie