Check engine light for 2007 Jeep Liberty?

My check engine on my Jeep Liberty is on. I took it to a mechanic and they thought it was the oxygen sensor. After replacing them, they found out that was not the problem and could not figure out what the problem was. They were nice not to charge me anything for their time... Read More

  • If you go to a local auto parts store like Advance, Auto-Zone, or some such store, they should have a diagnostic computer that they can plug in for free to see what code the Jeep is sending. That will let you know for sure what the problem is, and you may (depending on your mechanical inclination) be able to replace... Read More
  • This happened to me - had to replace all of them - one by one. Reference:2006 TJ with 6 cylinder

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