odb codes

  1. E

    2011-KK-Multiple ODB Codes-Engine

    I have a 2011 Jeep Liberty Sport 4WD, 3.7l OEM status. I have had various ODB codes over the last few months, starting with P0133 and P0420. I replaced both upstream O2 sensors and also the spark plugs. It ran well for a few weeks and now is much worse with rough idling and more codes. The...

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