The "check engine electronics" warning has come on. Fault code said EGR problem. I understand this could be a carbon-blocked inlet, at the intake manifold/EGR pipe. This would be the cheapest to fix (before replacing the valve and/or line), so I would like to try. Is this a DIY for a reasonably-competent shade tree mechanic? Any advice would be appreciated.

Coincidentally, the fault appeared within 15 miles driving after I replaced the battery. I needed to disconnect the battery again, which cleared the fault, but it came back after another 50 miles of driving. I assume the battery disconnect is just a coincidence, since the fault code was read by an independent shop (I watched).

Your help will be really appreciated,

Best,

g

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64 230sl, my daily driver
94 E500, sold
98 E320, family and dog hauler
04 C240, safe machine for teen drivers, but a poc
08 audi a4, yes we have gone to the dark side