P204C
Reductant Pressure Sensor Circuit Low
System: AdBlue/SCR
Severity: medium
What does P204C mean?
The DTC P204C (Reductant Pressure Sensor Circuit Low) is a fault code stored by the ECU when it detects a AdBlue pressure low 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 P204C
- Failed AdBlue pump
- Pressure sensor fault
- AdBlue line leak
How to fix P204C
Pump replacement often required. Verify with bidirectional control.
Tuning approach with DaVinci Deluxe · Cloud Edition
For P204C, DaVinci Deluxe · Cloud Edition offers the following ECU map adjustments and software solutions:
- SCR/AdBlue Off (where legal)
- Disable AdBlue DTCs
Need to fix P204C on your ECU?
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