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Failed OBD TEST-Help needed

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04GPGT2

Post subject: Failed OBD TEST-Help needed

Posted: Mon Jan 02, 2012 3:02 pm

GPONA SE Member

Joined: Sat Feb 21, 2009 2:44 am
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Name: TP

To All: Need Help before I go to dealer or mechanic:
This is in regards to 2004 GP GT2 with 60,000 miles
(1) Went for the annual registration inspection sticker today...results failed inspection
(2) The safety inspection was OK
(3) What failed was the "OBD" On-Board Diagnostic Test
(4) The report shows OBD Communication result = Fail/ In other words the OBD could not communicate
with the test equipment..
(5) The guy doing the test probed around in the fuse panels and told me power is not getting to the OBD connector
thus its unable to link with his test equip so he can perform the emissions test.
(6) Has anybody heard of this type of problem and know what it is ?
(7) If so can this be an easy fix at home/or this a dealer problem.?
(8) I also noticed if this helps/ I installed over a year ago a glow shift elect volt/and elect oil pressure gauges/ they were hooked up to the fuse panel with those add circuit extensions/both gauges stopped working a while back but I passed inspection last year. So i don't know if this contributes to the problem or not/also this gauges are still connected and still don't work..
(9) Any thoughts on what the problem is with OBD ???

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michaelbm

Post subject: Re: Failed OBD TEST-Help needed

Posted: Mon Jan 02, 2012 4:07 pm

GPONA GTP Member

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Name: Mike

Check for a burnt fuse, specifically the onstar fuse or cigerette lighter fuse. I forget which one the obd port uses.

Even if you dont have onstar there will still be an onstar fuse.

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FLIP

Post subject: Re: Failed OBD TEST-Help needed

Posted: Mon Jan 02, 2012 6:11 pm

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Check all the fuses

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Never argue with an idiot, he will drag you down to his level and beat you with experience.

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Mater

Post subject: Re: Failed OBD TEST-Help needed

Posted: Mon Jan 02, 2012 7:38 pm

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Joined: Mon Mar 24, 2008 10:36 pm
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michaelbm wrote:

Check for a burnt fuse, specifically the onstar fuse or cigerette lighter fuse. I forget which one the obd port uses.

Even if you dont have onstar there will still be an onstar fuse.

it uses both fuses at least on the 97-03 cars

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92 LeBaron Convert: Turbo 3L 97 Grand Prix GT 4dr "Frankenstein": L67 4t65 swap
97 Grand Marquis: Summer DD 99 Grand Prix GTP: Top Swap Beater

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Robodude

Post subject: Re: Failed OBD TEST-Help needed

Posted: Mon Jan 02, 2012 7:47 pm

GPONA GTP Member

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Name: Robert M.

i never even thought this was possible, lol perhaps this is why my obdII -> pc cable keeps failing to connect lol

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nuff said

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Mater

Post subject: Re: Failed OBD TEST-Help needed

Posted: Mon Jan 02, 2012 9:27 pm

GPONA VIP Member

Joined: Mon Mar 24, 2008 10:36 pm
Posts: 6264
Location: Mt. Pleasant, MI
Thanks given: 6 times
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Age: 24
Name: Tom Hay

the GTX had the same problem

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92 LeBaron Convert: Turbo 3L 97 Grand Prix GT 4dr "Frankenstein": L67 4t65 swap
97 Grand Marquis: Summer DD 99 Grand Prix GTP: Top Swap Beater

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