Fix for P1626 & P1629!!!

[Brad243]

This should pertain to most GM vehicles with a similar steering wheel/column setup as a 2000 Grand Prix. If your vehicle deliberately shuts off right after cranking, this may pertain to you.

My GP would sometimes shut off right after starting. I checked the DTC's with a scan tool, and found two codes: P1626 - Theft Deterrent Fuel Enable Signal Not Received and P1629 Theft Deterrent System - Cranking Signal. I printed off an Anti-Theft wiring diagram for my 2000 Grand Prix GTP w/ PassKey III, and went to work.

I previously noticed that whenever I would turn the steering wheel back and forth right after starting, the car wouldn't shut off. So, I began checking around the steering column since that must be where the issue is. Also, the diagram had shown that the Theft Deterent Module is located around the ignition cylinder, and a dark blue wire for the fuel enable circuit leads from that to the PCM.

I took off the bottom panel of the steering wheel column, and checked out the module and wires. I immediately noticed that the dark blue wire had a gash in it. It was from a metal ring on the steering wheel. BINGO. I did some troubleshooting. I started the car with the wire touching, and it would shut off, without it touching, it would start just fine. Did that a couple more times to make sure it wasn't a coincidence. It wasn't, it WAS the problem. So, I wrapped the wire with some electrical tape, and taped the set of wires down so they wouldn't rub again. I reassembled everything, and bam, problem solved. **** it's nice to fix stuff by yourself and save money.

P.S. Couldn't post pictures because they would have to be 200 x 400... WTF?

[streetracer]

Email them to me Jfreimuth2002@yahoo.com and I will post them for you.

Thank you for the writeup

[streetracer]

Actualy I have fixed the problem. You can post pictures now.