P2ADEReductant Tank Temperature Sensor B Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2ADE is the general circuit code for reductant tank temperature sensor B, intended for systems that report a fault on this input without splitting it into low, high or erratic. No manufacturer documents P2ADE publicly. GM, where the sensor B family is on record, reports such faults through P2ADB, P2ADC and P2ADD plus the plausibility code P2ADA, and its 2025 DEF controller names exactly those four as the sensor B fault set. Deutz files an open circuit of its second tank temperature sensor at the suction point under its own code P1241 instead. CARB requires emission-related inputs to be checked for open circuits and for readings outside their possible range. Where P2ADE does show up, treat it as an open or unreadable sensor B circuit: inspect connector, wiring and the tank sensor unit.
- What you may notice
- Check engine light on
- DEF or SCR warning
- Possible inducement countdown
- Likely causes
- LikelyOpen signal line or unplugged tank sensor connector
- PossibleFailed tank sensor unit
- RareInput fault in the SCR or engine control module
- 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: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.