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Discussion Starter · #1 ·
I got the P0401 code which is "exhaust gas recirculation flow insufficient detected"

I understand that the EGR might be dirty or the vsv might be the problem.

Here is a picture of my egr with and without the cap and filter:




questions:
1. how do you clean the egr?
2. how do you check the vsv?

thanks.


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