Powertrain, generic (extended)

P269B Exhaust Aftertreatment Glow Plug Control Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

Some diesels inject fuel into the exhaust through a small vaporizer whose glow plug turns the fuel into vapor before it reaches the oxidation catalyst. Ford calls this downstream injection (DSI) on the 3.2 L Transit, used so that filter regeneration needs fewer in-cylinder post injections and less oil is diluted. P269B covers an open in the circuit by which the engine computer controls that glow plug. Ford's diesel summaries from 2017 and 2018 watch the line continuously with key on at 9 to 16.3 V battery voltage and set the open fault when the voltage stays between 2.9 and 3.2 V for 5 s. The 2015 and 2016 summaries reported the same condition as P2687. With the plug dead the fuel cannot be vaporized, so regeneration is cut back and the lamp comes on.

Likely causes

Open wire or connector between engine computer and glow plug relay
Vaporizer glow plug relay coil open
Blown fuse in the glow plug control feed

Symptoms

  • MIL on
  • Particulate filter regenerations fail or become rare
  • More frequent in-cylinder regeneration, oil level may rise

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–500
Time0.5–2 h

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

Parts involved

aftertreatment glow plugcontrol modulewiring harness

Related codes

P269CP269DP269EP269FP26A0P2687

References: fordservicecontent.com, fordservicecontent.com, fordservicecontent.com.