OBD-II code · Powertrain (generic, extended)
P2ADA Reductant Tank Temperature Sensor B Range/Performance
The reductant tank B temperature signal does not match plausibility checks against related signals. Sensor drift.
Is it safe to drive with P2ADA?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySensor characteristic drifted
- PossibleSensor mounting displaced from reference path
- Less likelySensor element aged beyond calibration window
Symptoms
- Check engine light or NOx warning on
- AdBlue/DEF level or quality warning
- Possible no-start countdown after ignore period
- Failed emissions inspection (NOx)
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Likely to fail
- Parts involved
- Reductant Tank Temperature Sensor B, Wiring Harness, Scr Module
Related codes
- P2AD7Reductant Pump Motor Position Sensor Range/Performance
- P2AD8Reductant Pump Motor Position Sensor Circuit Low
- P2AD9Reductant Pump Motor Position Sensor Circuit High
- P2ADBReductant Tank Temperature Sensor B Circuit Low
- P2ADCReductant Tank Temperature Sensor B Circuit High
- P2ADDReductant Tank Temperature Sensor B Circuit Intermittent/Erratic
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.