Cant read codes ? Any ideas

[redrat]

My check engine light came on so i went to the local Parts store ( Oreillys, auto-zone, advanced ) and the OBD2 scaners kept saying it wasnt conected. i treid 3 diferent scaners and they all say its not conecting. All the pins on the OBD2 plug are strait and the wires are still conected at the back side. I have checked and cleared codes befor but now it wont conect to the computer.. its on a 2003 GMC. Any ideas on what to do to get it to conect?? And yes i had the key on

Thanks for any help. Ryan

[truckdude239]

Check the cigar lighter fuse it controls the obd port if it is blown there is no power to the obd port this is pretty common on the gms and i replace them left and right to get a car to pas the obd 2 inspections down here

[truckdude239]

have you had the chance to check the fuse yet? i'm pretty sure this fuse is your problem

[redrat]

THAT WAS IT !! It looks like its an O2 sensor. with only 53,000 miles on it im wondering if its this dam mixed fuel we have to use now? Thanks again for the help.. I really didnt want to pay the dealer to tell me i had a bad fuse..

Ryan

[truckdude239]

its a common problem on gms and the odb2 not conecting is a blown fuse

[53burb]

Thanks truckdude239!!! I had the same problem as redrat. I checked the fuses before, but nothing las labeled as obd or anything else like that. It works now. Now I gotta figure out the codes that were read.