Question about 2002 Jeep Grand Cherokee

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2003 Jeep Liberty

Check engine light is on - within the last couple of days seems to be running harder than usual.
Codes that appear when checked (myself) P0455 and P0442 Please advise

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P0455 is evap control system no purge or large leak
p0442 is evap control system leak detected (small leak)

the cause for both could actually be a loose gas cap.

Posted on Jan 28, 2010

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Posted on Jan 02, 2017

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The light indicates the recognition and storage of an digital trouble code to the system´s memory to the driver. You should see a mechanic to check the ECU (engine control unit) for saved trouble codes.

Please don´t hesitate too long to prevent the engine from serious damage.


Kind regards from Germany

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