Leave key in for a while? No start

Had this issue with my '06. Leave key in ignition (just hanging there, nothing on) for >20 min. or so, turn to start, dies in 2 seconds no matter how many tries. Will not start unless you remove and re-insert.

Thought it was my immobolizer going bad, but same thing on my buddies '06, we did an experiment. must be some sort of dumb anti-theft feature. Would be good to have this stated in the owners manual. I'm sure some have gone crazy troubleshooting. We did not observe the red key symbol re-illuminating stating ignition disable.

 

Hmmmm, interesting. Never heard of this

 

never heard of this either. i’d like to say maybe that’s an aftermarket security feature but it happened to your buddies truck too. weird.

 

If you are sure it is your immobilizer because you see it blinking then you need to jumper pin 4 and 13 on the OBD 2 connector for 30 minutes while the key is in.

- Remove key
- Jumper said pins
- Insert key for 30 minutes and put a timer on it, anything less than 30 will not be valid
- Turn off key after 30 minutes
- Remove pins
- Attempt to restart truck

After that the immobilizer should be reset and the truck should start and stay on. If it does not, you have another issue going on.