How are you guys checking for these codes?

I've read that you can cycle the ignition on and off three times in less than five seconds and the codes will appear on the digital odometer. Is this correct?

How do you know when your truck might have a problem (unless of course you can tell)?

Do you just routinely check every once in a while?

Thanks for the help and sorry if this is an ignorant question.


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this is not an ignorant question. not at all.
turn the key on and off 3 times(it isnt a race) and then back to on. the odometer will show any codes present. if there is a code, it will be a letter P and 4 numbers. example P0168. if there are none, it will say done.
then you look at this handy dandy link and look up your code.
https://www.dieseltruckresource.com/...n&onlynewfaq=1
if there is an issue, you will have a driveability problem or the little engine symbol will appear on the instrument cluster.

 

Sweet. Thanks.

So, typically if the light is not on or there is no "driveability" problem there is no need to check?

I'm adding the link to my favorites, thanks. Hopefully I will never need it.

 

that link at the top of the page under tech facts, common faq, then computer fault codes.

if there is no light, and the truck has been doing fine. no worries.

 

Will the key off and on thing work with on an 03?

Pav