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Chevrolet Master
21,873 Answers
- Posted on Sep 03, 2013
Re: My check engine light is on and I am getting OBD...
Code 401 is for a problem with the EGR valve.
Code 449 is for a problem with the vent valve solenoid for the gas tank venting system or EVAP.
You would need a shop manual to get the test procedures for each code.
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