Jeep Liberty Check Engine Light. Welcome to the Jeep Check Engine Light codes page. Jeep check engine light (CEL) comes on when the On-Board Diagnostic (OBD) system detects a problem with the engine, transmission, or evaporative system.

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I had this with my KJ this week, and it was a gas cap issue as well. This may take a number of miles or even a. Scanner was very easy to use and diagnose a check engine light on my daughters Jeep Liberty.

Then, the code will clear itself when the appropriate test has been run and passed by the Powertrain Control Module.

Could this be a result of the cat or is it a separate more serious problem?

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Question: Will check engine light reset itself with this code? Which fuse is blowing? check the fuse cover for the location of the fuse in question, let us know what that fuse controls. Scanner was very easy to use and diagnose a check engine light on my daughters Jeep Liberty.