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grahamjf

EGR valve insufficient flow

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Hi all

I took my car to audi to get a diagnostic check done came back as egr valve insufficient flow.
Bought a new siemens EGR valve and I am Still getting the same fault code
The pipe feeding the egr valve has slight oily/sooty coating on the inside which can be wiped off with your finger. No blockages in the pipe.

What else could cause this fault?


2005 Audi A4 2.0Tdi

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I usually use a VERY liberal spraying of carb cleaner all through the pipes as far as I can reach on all the lines connected to the EGR.  Let it dry and then try it.

 

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