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How to Check and Reset Engine Codes

277453 Views 71 Replies 56 Participants Last post by  radioactive
2000 and newer Dakotas and Durangos have a built-in system that can display check engine light (CEL) codes without the use of a scanner. 1999 and earlier Dakotas/Durangos must be read with a scanner, check your local dealership or auto parts store for assistance.

To check your engine codes:
Turn the key to ON (not start), OFF, ON, OFF, ON and leave it there. If you look in the odometer window the codes will flash any code(s) with a small delay between each result. Each code should be in a P#### format and will say PDONE when completed - turn your key to OFF and remove. Use the OBD code list to determine what problem the computer detected.

To reset your engine codes:
Remove the negative terminal of your battery (10mm wrench).
Turn your ignition key to START and hold it there for about 15 seconds.
Turn your ignition key to OFF and remove it.
Connect the negative terminal of your battery.
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Hi all - so my 2003 Durango was putting up a P0440 and P0456 code with a CEL. I was able to reset both and clear the CEL with my Harbor Freight code reader:


It was about 90 bucks and they always give coupons. Hopefully the CEL will stay cleared. Thanks to the OP for putting up this thread :)

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