Pontiac Problems? Ask a Mechanic for Answers ASAP
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The common problem is the EGR valve, I would go ahead and replace. Let me know if you have questions, thanks.
The two common causes for this code is EGR valve and transmission control module. The EGR is something you can do yourself but transmission control module would need to be reprogrammed with dealer scantool. Let me know if you have more questions, thanks.
It can but problem is more likely transmission control module, I would still start with EGR myself since it is cheaper and something you can do yourself. Another option is to put a block off plate under EGR to see if that stops problem if so replace. If not then replace transmission control module.