Powertrain, generic (extended)

P263D Reductant Heater Driver Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

DEF turns solid at about -11 °C, so SCR systems heat the tank, pump and lines electrically. P263D concerns the power stage that switches these heaters rather than a heater element. On Ford's 6.7 L Power Stroke the heaters are switched by the glow plug module; the plausibility test runs once per trip at peak heater power and sets P263D when the driver circuits exceed 125 °C. Element faults are separate (P20BA, P20BE heater A/B performance, P20C2 heater C supply below 5 V). Deutz uses P263D-00 differently on its EMR engine controllers, namely when defrosting the AdBlue system fails. If the fluid cannot thaw, dosing starts late or not at all, NOx rises and the SCR warning sequence toward a speed or power limit can begin.

Likely causes

Heater power stage overheating from excessive load current
Partially shorted heater element or wiring drawing too much current
Internal fault of the module that drives the heaters

Symptoms

  • Check engine light and DEF/SCR warning
  • DEF not thawing in cold weather, dosing delayed
  • Countdown to speed or power limitation possible

Repair estimate

DifficultyHardWorkshop job
Parts and labour€150–1,500
Time1–4 h

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

Parts involved

reductant heaterglow plug control modulereductant control module

Related codes

P20BAP20BEP20C2P20B9P205B

References: fordservicecontent.com, fordservicecontent.com, serdia.deutz.com.