2007 GMC Canyon scan code

2007 GMC CANYON
108,838 MILES • 3.7L • 5 CYL • 2WD
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TGJR63
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The Canyons check engine light came on and my friend scaned it for me and got a P2433 code reout. What does that mean.?
Sep 10, 2014 at 7:52 PM
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HMAC300
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that is your secondary air injection system so check to see if the solenoid is working and not stuck but it can be a short or something else causing it so a pro should look at it. we have no pics of it but it's on upper right of engine.
Sep 11, 2014 at 5:11 AM