Powertrain, generic (extended)

P202F Reductant/Regeneration Supply Control Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P202F covers the commanded supply stage that feeds the reductant system or, in some layouts, the regeneration hardware, typically a supply pump or its power feed. The circuit is electrically present, but its behaviour does not match the command, for instance current or voltage that drifts outside the window expected for the requested state. J2012 leaves the exact component to the maker, and no manufacturer documents P202F publicly. Ford's 2023 diesels show how such a stage is watched under other codes: the reductant pump controller must keep its supply between 8.5 and 19 V (P21CB/P21CC) and its current below 15 A, and pump speed may not stray more than 300 rpm from target (P208B). CARB requires output components to respond properly. Likely causes are a weak relay or fuse contact, a pump that draws too much, or a faulty controller.

Likely causes

Weak relay or fuse contact in the supply feed
Supply pump drawing excessive current (wear, blockage)
Fault in the dosing or pump control unit

Symptoms

  • Malfunction indicator lamp on
  • DEF system warning, dosing reduced or stopped

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–1,200
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

P208AP208BP21CBP20EA

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