The Check engine light code reader won't activate when I plug in a code reader.

Asked by Jeffrey Oct 19, 2018 at 06:23 PM about the 2006 Hummer H3 4dr SUV 4WD

Question type: Maintenance & Repair

My check engine light came on so I plugged in my code reader into the code reader port and it would not power up. So to make sure that I did not have a faulty code reader I used a different code reader and plugged it in, same result. If you have any information please contact me.

1 Answer
159,355

Bob answered 6 years ago

Many of the OBDII ports are connected to the cigar lighter circuit. I'll bet the cigar lighter (power port) fuse is blown.

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