P0401 Cadillac -

Question

What does this falt mean? And how do I fix it?
Does affect the car's performance?

Thank you.

Answer 1

HI there

This code is for insufficient EGR. It will not drastically cause any engine issues, there are a few possible issues. Please see more info here.

P0401 CADILLAC - Exhaust Gas Recirculation Flow Insufficient

Read more: https://www.autocodes.com/p0401_cadillac.html