link error scanner wont read codes - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 11-09-2011, 09:54 PM   #1
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Exclamation link error scanner wont read codes

I have a 1995 pontiac bonneville ssei.my chek engine light is on.i bought a scanner that will read obd1 an obd2 codes.but when i plug it in i get a link error my scanner is a innova 3120 it just wont read i get link error,what to do please help thanks
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Old 11-10-2011, 12:42 AM   #2
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I have a scan tool that does not read one of my cars (05 equinox), but reads the others fine, the mfr says that occasionally happens due to software, if it reads fine on other cars, nothing you can do, except buy another scan tool. I also recall around 94 or 95 was a transitional year for obd on gms. you just might not have the right scan tool. I had a 95 trans port that can only be read by dealer equipment.
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Old 11-10-2011, 03:04 AM   #3
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That vehicle uses the infamous OBD 1.5. Essentially an OBD 2 port with an OBD 1 computer behind it. You need to have a scanner that specifically advertises compatibility with GM OBD 1.5 systems, and I didn't notice this on that scanner that you posted. They are out there, but most of the lower level stuff won't do it. I think on last account, it took at least $120 for a scanner that did what you need.
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Old 11-10-2011, 10:38 AM   #4
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Quote:
Originally Posted by robauto View Post
I have a scan tool that does not read one of my cars (05 equinox), but reads the others fine, the mfr says that occasionally happens due to software, if it reads fine on other cars, nothing you can do, except buy another scan tool. I also recall around 94 or 95 was a transitional year for obd on gms. you just might not have the right scan tool. I had a 95 trans port that can only be read by dealer equipment.
I had the same issue last weekend on my sister'* 01 Rendezvous, and found one of the fuses had blown. Replaced the fuse and was able to scan for codes. You might want to check that out. The difficult part is the label does not tell you which fuse the OBD port is linked to, so you may have to check all the fuses.
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Old 11-10-2011, 11:13 AM   #5
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ok will check fuse.or i just hafe to buy a nother scanner thanks
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Old 11-13-2011, 10:06 PM   #6
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It'* usually the lighter fuse that powers up the data link connector.
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Old 11-13-2011, 10:19 PM   #7
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ok will check that then
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