Powertrain, generic · Computer and auxiliary outputs

P06FA Glow Plug Control Module 2 Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P06FA means glow plug control module 2 does not respond correctly to the glow command – the counterpart of P06E5 for module 1. For module 1, Ford's 2023 Power Stroke flags internal drivers that fail to switch or overheat for more than 1 s; GM's L5P files the same check under P064C (under 3.2 A with 0 V at the plug for 3.5 s, two trips). No manufacturer document available to us uses a second glow module – Ford's and GM's V8 diesels drive all eight plugs from one; the code suits systems with one module per cylinder bank. The description follows module 1 (P06E5). Internal checksum errors are P06FB, overheating P263F. The plugs of module 2 then heat poorly or not at all, typically on one bank.

Likely causes

Glow module 2 faulty internally (drivers do not switch)
Poor supply or ground of module 2
Module overheating
Module software

Symptoms

  • Check engine light, possibly glow plug/wait-to-start lamp
  • Hard cold start, long cranking in frost
  • Rough cold idle and white smoke, often one cylinder bank only
  • Usually no symptoms when warm

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–700
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

glow plug control module 2module power supplymodule ground

Related codes

P06E5P06F5P06FBP06F9P263F

References: law.cornell.edu, fordservicecontent.com, gsi.ext.gm.com.