← Power loss / limp mode on all engines

Symptoms · ProMaster EcoDiesel (2014-2016)

ProMaster EcoDiesel (2014-2016): loss of power, limp mode or derate

3 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.

1. DEF/SCR and DPF regen duty (2014-2016) Common · 9 complaints
2. Turbo and charge-air path Occasional · 1 complaints
3. EGR system: coking and the cooler-with-valve assembly 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/SCR and DPF regen duty (2014-2016)

aggregated How widespread: Common 9 NHTSA owner complaints match it, out of 23 checked

How it shows up

• DEF warnings and countdown derate

Its other signs

• frequent regens on short-trip duty; DPF load messages
• DEF crystallization at the filler/lines

How to tell it apart

• verify DEF quality and level-sensor behavior first
• read DEF/NOx DTCs front vs rear; inspect for crystallization
• check regen frequency against duty cycle before condemning the DPF

Usual fix

DEF system service per procedure (pump/injector/tank per findings); never delete

Root cause, parts and sources →

2 Turbo and charge-air path

aggregated How widespread: Occasional 1 NHTSA owner complaints match it, out of 23 checked

How it shows up

• underboost/limp episodes

Its other signs

• whistle from charge piping; boost DTCs under load

How to tell it apart

• smoke-test charge piping incl. intercooler and hoses
• read boost setpoint vs actual under load
• check the turbo actuator linkage for free movement

Usual fix

charge-path hose/intercooler renewal or turbo replacement per diagnosis

Root cause, parts and sources →

3 EGR system: coking and the cooler-with-valve assembly

aggregated How widespread: Occasional

How it shows up

• power loss as the intake cakes up

Its other signs

• EGR flow DTCs, rough idle, haze on cold start

How to tell it apart

• read EGR DTCs; command the valve; inspect pintle and intake for coking
• clean first per the community pattern; replace the assembly when the valve/cooler is done

Usual fix

EGR cleaning or cooler-with-valve assembly replacement

Root cause, parts and sources →

Other symptoms on the ProMaster EcoDiesel (2014-2016)

Misfire, rough idle, hesitation or surging

Everything on the ProMaster EcoDiesel (2014-2016)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.