So my wifes 2006 Dakota 8cy had the eng light come on. Took the truck to Autozone and he said it shows no code definition. But the light still on. Well coming home later the light did shut off after stopping for my lottery tix. Anyone have the same problem?

 

I'd say something simple like a gas door? That warning would show up on your odometer though but can trigger engine lights.

 

the only real way to figure out what the code is or was, is to get a starscan tool (chryslers scanner) and retrieve the code. Its most likely still saved in the computer, but autozone dosent have such a sufficient scanner to pull the code.

was a fuel cap its would say "9ascap" were the mileage is....the check engine light should(ive never seen in my whole experience on a dakota 3rd gen) never come on.

 

I'd say you picked the winning number!

 

was a fuel cap its would say "9ascap" were the mileage is....the check engine light should(ive never seen in my whole experience on a dakota 3rd gen) never come on.[/quote]

IF it does trigger a DTC the code is usually recognized as a vacuum leak