P204D
Reductant Pressure Sensor Circuit High
System: AdBlue/SCR
Severity: medium
What does P204D mean?
The DTC P204D (Reductant Pressure Sensor Circuit High) is a fault code stored by the ECU when it detects a AdBlue pressure high 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 P204D
- Blocked AdBlue injector (crystallized urea)
- Failed pressure regulator
- Sensor fault
How to fix P204D
Clean/replace AdBlue injector — crystallization is the #1 cause.
Tuning approach with DaVinci Deluxe · Cloud Edition
For P204D, DaVinci Deluxe · Cloud Edition offers the following ECU map adjustments and software solutions:
- AdBlue Off solution
Need to fix P204D on your ECU?
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