OBD-II code · Network
U061A Lost Communication With Reductant Level Sensor B
The vehicle bus reports loss of communication with smart reductant (DEF/AdBlue) level sensor B. Tank-level monitoring switches to a substitute model; refill warnings may be incorrect.
Is it safe to drive with U061A?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBus wiring open or shorted
- PossibleModule without power or ground
- PossibleModule failed
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Reductant Level Sensor B, Vehicle Bus Wiring
Related codes
- U0619Lost Communication With Reductant Level Sensor A
- U061BLost Communication With Reductant Level Sensor C
- U0617Lost Communication With Engine Coolant Bypass Valve C
- U0618Lost Communication With Engine Coolant Bypass Valve D
- U061CLost Communication With Reductant Temperature Sensor A
- U061DLost Communication With Reductant Temperature Sensor B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.