Truck wonít start with code reader plugged in??? - Chevy and GMC Duramax Diesel Forum
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post #1 of 2 (permalink) Old 09-18-2019, 05:11 PM Thread Starter
 
Join Date: Apr 2016
Posts: 7
Truck wonít start with code reader plugged in???

2005 LLY, no tune installed. With the truck running, when I plug my code reader/scanner into the OBDII port, many of the dash lights start flashing/blinking/Ēservice 4wdĒ/fuel gauge goes to E, but the truck will drive fine. I unplug the scanner and everything returns to normal.

If the scanner is plugged into the truck first, then I try to start the truck, the truck starts and dies immediately.

This same scanner used to work fine in this truck, and it still works fine in my dadís 2005 LLY and in various other vehicles.

Iíve checked various fuses, harnesses, etc.

No codes are being thrown.

Any ideas?
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post #2 of 2 (permalink) Old 09-18-2019, 05:14 PM Thread Starter
 
Join Date: Apr 2016
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Admin: This is a double post of a thread I created a few hours ago (glitchy internet). Please delete this thread.
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