Question about 1999 Pontiac Grand Am GT

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Why is my obd II reader saying failed iso link?

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If veh wont run its a bad ECM or power to the ECM... or bad scaner its veh runs

Posted on Jul 04, 2013

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Posted on Jan 02, 2017

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SOURCE: cannot find the data link connector in my 2004 grand am

it should be at the bottom right corner of the underside of the dash (drivers side of course) almost below the steering wheel. If it isn't here, it has been moved, but keep looking because they are never any further away from the steering wheel than 4 feet (legal limit for most stated)

Posted on Nov 20, 2008

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What kind of code reader should I buy for a 1995 Pontiac Trans Sport car?


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2003 Saturn LW300 3.0V6 engine light came on, tried to read with a code reader and the reader could not link up, I checked all connections and they were good, it read the codes fine on my friends Pontiac,...


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You can buy a cheap dongle (less then $40 -- http://www.autoditto.com/cheap-obd-ii-scanner.html) (at Canadian Tire, and I think Walmart) where it'll tell you what error code is activated and then you can erase all codes along with a few other options, nice to have if you use it a lot. Otherwise the shop is the next place (Unless you know someone with an OBD II reader -- which is a more deluxe version then what I was explaining previously)
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You can DIY for $6 using http://hackaday.com/2007/11/07/inexpensive-pic-based-obd-2-interface/

Reference links for OBD II readers http://www.amazon.com/Check-Engine-Scanner-Trouble-Reader/dp/B000LEPT5G
http://www.amazon.com/exec/obidos/ASIN/B0007LEG2K/ref=nosim/ihco-20

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