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
For P204C, DaVinci Deluxe 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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