Recipe - Ram 1500 EcoDiesel 3.0L V6 (2014-2019)
Specific Fix build
Reliability tier: verified - verify before ordering, see /disclosure/
DEF system job for the 3.0L EcoDiesel (mode DEF tank / heater faults (frozen-DEF derate cycle)): 'SERVICE DEF SYSTEM - ENGINE WILL NOT RESTART IN 200 MI' cycle, stuck gauge, cold-weather faults. Read the codes first (NOx-sensor faults mimic the warnings), then work tank-side: harness -> doser -> tank unit. Two tank families split the run (early 2015 / late 2017-2019).
Parts
- Ram 1500 EcoDiesel DEF Tank Harness (Mopar 68207319AD, 2014-2015) - tank harness 68207319AD (2014-2015) - the wiring before the expensive hardware (qty 1)
- Ram 1500 EcoDiesel DEF Dosing Injector Module (Mopar 68232842AD, 2014-2019) - dosing injector module 68232842AD - crystallization/dosing faults (cheap tank-side fix) (qty 1)
- Ram 1500 EcoDiesel DEF Tank Assembly with Temp Sensor (Mopar 68161432AI, 2015) - early DEF tank w/ temp sensor 68161432AI (2015 window) - the heater/level hardware (qty 1)
- Ram 1500 EcoDiesel DEF Tank Assembly with Temp Sensor (Mopar 52029737AI, 2017-2019) - late DEF tank w/ temp sensor 52029737AI (2017-2019) - the heater/level hardware (qty 1)
- Ram 1500 EcoDiesel DEF Pump (Mopar 68240043AC, 2018-2019) - DEF pump 68240043AC (2018-2019) - tank-side pressure faults; the dealer catalog notes it is serviced with the tank (qty 1)
Install order
- read the DEF codes first - NOx-sensor and doser faults trigger the same warnings; do not buy a tank on a hunch
- cold-weather-only faults = heater circuit: check the tank harness/connector (early trucks) before the tank unit
- dosing faults / crystallization at the injector: replace the dosing module
- tank unit confirmed (heater open / level hardware): order by the truck's year - early 2015 vs 2017-2019 families (2014/2016 = VIN verify at order)
- clear codes, complete a drive cycle, confirm the countdown warning is gone BEFORE the 200-mile deadline
Expected outcome
Parts budget
About $230-$2,350 in parts. It depends on what the diagnosis finds; each option below is what you buy together. Prices marked "at Dave's" are Dave's Auto Center's, the same as in his store; the others are approximate prices from OEM and maker catalogs, rounded (a manufacturer's list price can run higher). Parts only, no labor.