OBD Codes/reader

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Steve B - 23 Apr 2007 17:17 GMT

I'm coming up to my 15,000 mile oil change, and I figure my check engine
light will come on like it did for the first.

What's the sequence for getting the codes to display, for clearing them, and
what's a good reader that won't cost as much as a set of tire?

And is there a site that has all the codes so I can decipher them?

Steve

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Tom Lawrence - 23 Apr 2007 18:06 GMT

> I'm coming up to my 15,000 mile oil change, and I figure my check engine
> light will come on like it did for the first.

Your check engine light doesn't come on to remind you about maintenance -
only when something is actually wrong.

> What's the sequence for getting the codes to display, for clearing them,
> and what's a good reader that won't cost as much as a set of tire?

You can display the codes on the odometer by cycling the ignition
ON-OFF-ON-OFF-ON. To clear them, you need an OBD-II scan tool -
disconnecting the battery doesn't do it anymore.

check Harbor Freight (http://www.harborfreight.com) - they have some cheap
OBD-II readers for around $50

> And is there a site that has all the codes so I can decipher them?

http://www.obd-codes.com/trouble_codes/

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Roy - 23 Apr 2007 20:37 GMT

>> I'm coming up to my 15,000 mile oil change, and I figure my check engine
>> light will come on like it did for the first.
[quoted text clipped - 7 lines]
> You can display the codes on the odometer by cycling the ignition
> ON-OFF-ON-OFF-ON. To clear them, you need an OBD-II scan tool -

Tom, does that work on a 06?

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Tom Lawrence - 23 Apr 2007 23:35 GMT

>> You can display the codes on the odometer by cycling the ignition
>> ON-OFF-ON-OFF-ON. To clear them, you need an OBD-II scan tool -
>
> Tom, does that work on a 06?

Yep

In addition to the OBD-II codes, there's a separate check sequence to
display any instrument cluster codes. In the 3rd gen trucks, the IC is the
"brains" for most all cab-related functions - power windows, power locks,
etc. While holding the trip odometer reset button in, turn the ignition to
ON. Release the button when the gauges go into self-test. At the end, and
cluster codes in the form of xx nn will display. That means 'code xx
occurred nn ignition cycles ago'. You can find a list of cluster codes on
TDR, or I can dig them up here somewhere.

Note that the cluster codes have nothing to do with powertrain performance -
strictly electronic stuff in the dash/cab.

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Big Al - 24 Apr 2007 21:47 GMT

> >> You can display the codes on the odometer by cycling the ignition
> >> ON-OFF-ON-OFF-ON. To clear them, you need an OBD-II scan tool -
[quoted text clipped - 14 lines]
> Note that the cluster codes have nothing to do with powertrain performance -
> strictly electronic stuff in the dash/cab.

Hot damn you're good!!

Al

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