Can't read the code! - Ford Powerstroke Diesel Forum
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Old 03-11-2012, 04:39 PM
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Can't read the code!

Hey all. I have a 2000 Excursion w/ the 7.3. I had a GPCM fail on me, then I couldn't read any codes! I replaced the GPCM, cuz that's the last thing that read bad, hoping that will make the light go out, since I need to get it inspected to get it registered. Well, it starts easy while its cold, but the light came back on. I looked at the plug and I don't see anything wrong with it and traced the wiring back about 2 feet and nothing. Is there another way to get the codes? If not, how do I fix that? Thanks for the help!

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Old 03-12-2012, 07:04 AM
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What are you using to retrieve codes? If the not right equipment, and most are NOT right, that's what you get... Light's ON but "No Codes Present".
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Old 03-13-2012, 06:32 PM
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I'm taking it to advance auto parts. I've taken other vehicles to the same place and had no problems. I don't know the model, but its orange. The screen it is coming up with when it is plugged in is "please connect cable of reader to vehicle's diagnostic port", so its not even sensing it. I'll try again tomorrow, because I pulled the plug off to check the wires for any nicks or breaks.

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Old 03-13-2012, 06:38 PM
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Advance auto and auto zone code readers won't read our trucks because they aren't obdII compliant.

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Old 03-14-2012, 10:38 AM
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That's strange. I've had it read there in the past, maybe a year ago, and that's how I found info that possibly my GPCM had gone bad (6 GP had come up faulty LOL) I'm probably going to take it to my mechanic to have a pin test done. How are they not obd-II compliant, when they have an obd-II port under the dash?

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Old 03-14-2012, 11:33 AM
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Quote:
Originally Posted by Meat_Puppet View Post
That's strange. I've had it read there in the past, maybe a year ago, and that's how I found info that possibly my GPCM had gone bad (6 GP had come up faulty LOL) I'm probably going to take it to my mechanic to have a pin test done. How are they not obd-II compliant, when they have an obd-II port under the dash?
Yes, it's an OBD-II port, yes you can get some of the codes with a Generic OBD-II scanner, but NO our trucks are NOT OBD-II!

Here's the deal, OBD is a set of standards really and, because of the trucks GVWR, don't apply to us. First you can Forget the fact that it's a diesel truck engine and few of those generic codes apply, but for all the other systems (trans, body, etc.) where an "AutoZone or Advanced" scanner is pretty much useless...

Anybody who uses a Generic OBD-II scanner is just kidding themselves and wasting their time
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