Powertrain, generic (extended)

P2062 Reductant/Regeneration Supply Control Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

J2012 keeps this title deliberately broad: the controlled supply that feeds the reductant system or, in some layouts, the regeneration hardware, mostly a supply pump or the relay powering it. P2062 reports an open control circuit, so the commanded stage draws no current. No manufacturer documents P2062 publicly. Published systems monitor this function under component codes: Ford's 2023 diesels set P208A when reductant pump voltage sits between 2.6 and 3.4 V or the pump controller supply drops below 6 V, and Deutz reports an open DEF pump drive as P05EE-00. Typical causes are a blown fuse, a relay that does not close, a broken wire or a failed pump. Without supply the reductant line cannot build pressure and dosing stops; CARB treats this as part of reductant delivery monitoring.

Likely causes

Blown fuse or relay not closing in the supply path
Broken wire or unplugged connector at the pump
Supply pump with open winding

Symptoms

  • Engine or emission warning lamp on
  • No reductant pressure, dosing stops
  • Restart countdown or speed limit on some vehicles

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–900
Time0.5–3 h

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

Parts involved

reductant supply pumpreductant supply relay

Related codes

P2063P2064P202FP208A

References: law.cornell.edu, fordservicecontent.com, serdia.deutz.com.