P1339 - glow plug CEL

[Time2gofishing1980]

2020 3.0 dmax with 38k threw p1339 yesterday. No ill effect other than disabling the remote start while cel is on. 
 

seems to point to glow plug error. No trouble cold starting even down to 0*. 
 

Dealership didn’t have an appointment till the 25. Will update after. 

[Time2gofishing1980]

Dealership found a TSB and applied a software update. Cleared code and good to go. 

[gemarsh]

Well that was an easy fix, if it took care of it for you. Thanks for the update.

 

 

 

[EM58]

My 2020 with 95K miles had same issue BUT I also noticed the DEF gauge wasn't correct after filling the tank it remained at less than half, as the DEF tank fuel diminished the check engine light would come on again. After driving for about 50 miles it would go off, took to preferred Diesel  shop I was told that my issue was the computer needed an update. After 465.00 dollars later and driving less than 50 miles the light came back on. I'm pretty sure its my Glow Plugs and Def Tank, truck goes back first thing in the morning hopefully they can figure this thing out. 

[smiti3]

2020 3.0 duramax...80k...only 3 are mine sofar.....started throwing 3196 coolant code.....just after purchase....dealer had put in new batt.. brakes ..general service....so i figured it was just getting used to a new driver....stayed off for a while....now 3k later....has tossed it again...now with the 1339 glow plug code....dealer has reset ..cupple times....tranny has been updated ...for the recall.....dealer now put me on the appointment schedule...3 to 4 weeks.... got my own code reader ...will continue to reset so i can remote start....its cold here in ct....