Question about 2002 Cadillac Escalade

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02 escalade wont start now code p1631 on scanner how do i fix

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This is the theft deterrent system --- the body control module (BCM) and power train control module (PCM) have conflicting codes. The codes between the two must match. If you've replaced one, you need to 're-learn' them so the codes match.

Posted on May 03, 2014

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Posted on Jan 02, 2017

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I had the same trouble with my 2002 Escalade and it was really ease to fix. Check the cigarette lighter fuse for its condition. If this fuse is bad, the scanner will not work. Hope this helps

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If you mean that a scanner will not connect to the computer to read codes. most likely the fuse supplying 12 Volts to the OBD II plug is blown. Usually on GM cars it is the same fuse as lighter. Labeled LTR on fuse block Driverside of dash between door and dash. door has to be open to see it. on end of dash

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