1. JeepGirl1013

    Help Diangnosing P0161, P0158, P0740

    Ok so I need a new O2 sensor- as does everyone. But the P0158 just popped: O2 sensor circuit high voltage. Is this a sign I really need to replace the O2 sensor? Is there anything else I should be looking at? P0740 just started for me this week. I have been experiencing a long crank time...