Powertrain, generic (extended)

P269D Exhaust Aftertreatment Glow Plug Control Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

A low reading on the exhaust glow plug control line points to a path to ground before the load, so the control stage cannot set the right level and the vaporizer glow plug may be switched wrongly. Ford is the documented user: in its 2017 and 2018 diesel summaries the 3.2 L Transit judges the downstream injection glow plug circuit by voltage windows, and a reading held between 1.95 and 2.175 V for 5 s is classed as a short to ground (key on, battery 9–16.3 V). In 2015 and 2016 Ford used P2688 for the identical window. Typical findings are a pinched wire near the exhaust or a shorted relay coil. The DPF regeneration that relies on vaporized fuel is held back until the circuit is repaired.

Likely causes

Control wire chafed on the exhaust or body and grounded
Shorted coil in the glow plug relay
Heat-damaged connector near the vaporizer

Symptoms

  • MIL on
  • Regeneration suspended, rising soot load
  • Possible blown fuse in the glow plug feed

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 plugrelaywiring harness

Related codes

P269BP269CP269EP26A1P2688

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