Failure mode - Ram ProMaster 3.0L EcoDiesel I4 (2014-2016)

Glow plugs and module: cold starts

Reliability tier: aggregated - verify before ordering, see /disclosure/

Symptoms

glow lamp flashing (cylinder-level fault)
cold-start roughness/haze on cold mornings

Compare with the other causes of the same sign on this engine: misfire, rough idle, hesitation or surging (2 causes)

Root cause

Mercedes-diesel-style glow architecture on the F1C: module plus plugs, the flashing lamp names the cylinder. Community consensus tier - the fleet was too rare for a distinct VOQ cluster.

Diagnosis

read glow DTCs per cylinder; measure plug resistance before condemning the module
verify battery health first

Fixes

glow plug(s) and/or module replacement per diagnosis ()

glow-plug - more than one option: F1C Glow Plug Module (68167867AA), F1C Glow Plug (68576776AA, current)

Prevalence

common

Parts for this repair run about $60-$140: see them next to the other repairs on this engine in repair costs.