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.