Insufficient flow to ERG valve. Is this the map sensor?

The port the erg valve plugs into was completely clogged. Mechanic is going to clean it out, and reset the computer if the code returns, do you think I should have him run a smoke test to look for a vacuum leak? Thanks your that fast response!

Sorry about that, code: P0401. The computers been reset and the code has not come back. But it is still making a starnge noise when I try to accelerate hard and isn't accelerating fast. I called the mechanic back to ask if he had any ideas, he said there was a O2 senor code that had been in the memory. But that doesn't seem right.

No its not the same guy that replaced the egr valve. I just drove it around and the acceleration seems normal. It does make a grinding noise when I give it some extra gas. If I take it easy I don't hear the noise, but if I'm getting on the highway its there, right as I hit the gas peddle, but is gone before I pull my foot up. Sounds likes its coming from the front of the car. Grinding noise.

Took it to a friend, the noise was hard to hear, but it sounds like its coming from the engine, said he thinks it the heat shield vibrating. Does this happen more during acceleration?

I have a similar problem but I get code p0440 on 99 alero