Symptoms · EcoDiesel gen3 (Ram 1500 / Wrangler / Gladiator)

EcoDiesel gen3 (Ram 1500 / Wrangler / Gladiator): loss of power, limp mode or derate

2 documented failures on this engine list this among their signs. They are ordered from the most widespread down. Each one shows the signs in its record's own words, how to tell it from the others, the usual fix and any recall or bulletin.

DEF system faults (tank message, heater/quality faults, countdown warnings) Occasional
Turbo boost-control and throttle-body faults (P00AF, 'service throttle body' messages) Occasional

Not sure which engine you have, or want the recalls for your exact truck? Check your VIN: it names the engine and lists the campaigns for that model year. Whether a recall is still open on your VIN: nhtsa.gov/recalls.

1 DEF system faults (tank message, heater/quality faults, countdown warnings)

aggregated How widespread: Occasional

How it shows up

speed-limited / derate behavior as the SCR countdown runs out

Its other signs

'SEE DEALER' DEF tank messages and escalating countdown warnings ('DEF system issue - N mi to empty')
cold-weather heater faults and gauge/quality-sensor faults that mimic each other

How to tell it apart

read the DEF codes before replacing the tank - NOx-sensor and doser faults mimic the warnings
cold-weather-only faults = heater circuit; year-round gauge faults = level/quality hardware

Usual fix

replace the DEF tank-side hardware (heater + level/quality unit) when tank-side faults are confirmed

Root cause, parts and sources →

2 Turbo boost-control and throttle-body faults (P00AF, 'service throttle body' messages)

aggregated How widespread: Occasional

How it shows up

P00AF (VGT boost-control performance) and limp-mode events under load

Its other signs

'service throttle body' messages, mostly while towing; throttle response falls flat on acceleration

How to tell it apart

log boost/VGT position against the P00AF code before ordering an actuator - a stuck vane reads the same as a bad actuator
throttle-body messages concentrated under tow = fouling/carbon first, hardware second

Usual fix

replace the VGT actuator when boost-control codes persist with a clean air path

Root cause, parts and sources →

Other symptoms on the EcoDiesel gen3 (Ram 1500 / Wrangler / Gladiator)

Hard start, long crank or no-start Stalls or dies while driving DEF, DPF and regeneration warnings

Everything on the EcoDiesel gen3 (Ram 1500 / Wrangler / Gladiator)Its recalls and bulletins

Order: how widespread each failure is in its record (near-universal, very common, common, occasional, rare), then the number of NHTSA owner complaints that match its keywords. Complaint counts are keyword matches, not a manual review of each complaint. A symptom listed here means the failure is documented with that sign; it is not a diagnosis of your truck. Tiers: verified, aggregated, contested, data-gap. How we tier and source facts.