U061DLost Communication With Reductant Temperature Sensor B
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- Temperature sensor B is a second temperature input of the reductant system. Where it sits depends on the maker: at another spot in the tank unit, in the pump or supply module, or along the dosing line. Volvo's truck tank sensor, for instance, measures temperature at two points on its circuit board, yet sends everything over one CAN connection and reports a lost connection as U02A2 rather than with this code. U061D therefore belongs to designs in which temperature B arrives as its own digital message. If only B drops out, the controller can usually keep working with A but loses the cross-check between the two values and the heater control for that zone. No manufacturer publicly documents U061D. Circuit faults of an analog sensor B are P2ACC to P2AD0.
- What you may notice
- Malfunction indicator lamp
- Line or pump heating may not work properly in frost
- Likely causes
- LikelyWiring to the second temperature point (pump module or dosing line) damaged
- PossibleConnector of temperature sensor B corroded or not latched
- PossibleTemperature sensor B or the module housing it failed
- 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: €80 – €1,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.