P202FReductant/Regeneration Supply Control Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- Malfunction indicator lamp on
- DEF system warning, dosing reduced or stopped
- Likely causes
- LikelyWeak relay or fuse contact in the supply feed
- PossibleSupply pump drawing excessive current (wear, blockage)
- RareFault in the dosing or pump control unit
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.