P2062Reductant/Regeneration Supply Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- Engine or emission warning lamp on
- No reductant pressure, dosing stops
- Restart countdown or speed limit on some vehicles
- Likely causes
- LikelyBlown fuse or relay not closing in the supply path
- PossibleBroken wire or unplugged connector at the pump
- PossibleSupply pump with open winding
- 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 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.