Recommended repairs for error codes po101 mass air flow and po455 evaporative emissions control system leak

Although it's great you pulled codes, these will require a little more hands on testing to be sure what to replace. It's possible you need a mass air flow sensor but it could be a vacuum leak. Its possible you need a purge valve but that could be a leak as well. These are just examples. Here is a link to find a shop near you that can perform more testing and fix your car right the first time. https://repairpal.com/repair-shops Alex

The links posted below will provide close definitions and possible causes: http://www.autocodes.com/p0455_pontiac.html http://www.autocodes.com/p0101_pontiac.html Recommended: Hands-on testing - diagnoses and repair by qualified personnel.