Enter a fault code (e.g. P0401) to see its meaning. Log in for causes, severity & how to clear
Type the DTC shown by your scanner or dashboard, e.g. P0401.
We show the official SAE description and the affected vehicle system instantly.
Log in free for the subsystem detail, whether it's emissions-related and how Softechpro can clear it.
P0401 is Exhaust Gas Recirculation (EGR) Flow Insufficient Detected. Enter it above for the full breakdown and how to clear it.
Yes. The code description is free for everyone. Log in free to unlock the affected subsystem, emissions relevance and removal guidance.
Yes — for emissions codes (EGR, DPF, AdBlue/SCR) the desktop software can disable the function and remove the code from the ECU, then recalculate the checksum.
The desktop Softechpro Solutions software corrects checksums for 260+ ECU families and does DPF/EGR/AdBlue/DTC off, Stage tuning and DTC diagnostics offline.
See pricing — €299 one-time