P200B
Selective Catalytic Reduction (SCR) Reagent Tank Heater Performance
System: AdBlue/SCR
Severity: medium
What does P200B mean?
The DTC P200B (Selective Catalytic Reduction (SCR) Reagent Tank Heater Performance) is a fault code stored by the ECU when it detects a AdBlue tank heater condition in the adblue/scr subsystem. It is commonly seen on European and Asian vehicles using Bosch, Continental, Siemens or Denso ECUs.
Common causes of P200B
- Failed AdBlue tank heater (cold climates)
- Wiring fault
- Heater fuse
How to fix P200B
Cold-climate cars: heater prevents AdBlue freezing. Replace heater unit.
Tuning approach with DaVinci Deluxe
For P200B, DaVinci Deluxe offers the following ECU map adjustments and software solutions:
- AdBlue/SCR Off (where legal)
- Heater monitor disable
Need to fix P200B on your ECU?
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