I got this car and got it smogged on Saturday, but on Sunday afternoon my check engine light came on. I took it to a shop and they ran a diagnostic and told me I had a bad EGR system. However with a bit of research it doesn't seem possible to pass smog with a bad EGR valve. Maybe it's just dirty or maybe it's something else? It starts up a little rough but idles and drives well, but I did notice a lack of power at low speeds on a cold engine on Monday.
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1994 Volvo 960 Question: Is it possible to pass a California Smog test with a bad EGR valve?
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