Hi,
So my car is an old 2004 1.9 tdi Octavia, 180k miles on the clock.
The engine light came on and I read the code - PO401 - EGR flow insufficient detected.
I cleared the code/light but it came on again about a mile later. This was from a cold start. When the engine was up to temp, I cleared it again and the light/code did not reaper (I drove about 100 miles which may or may not have been the thing to do!). But still no light.
The next day it did the same. So it seems it's getting the fault when cold, but when warm everything is OK.
Any ideas what I should look at first? All I've tried so far is a can of the EGR cleaner you spray up the air intake pipe.
Thanks for any help!
Alan