HELP : PO172 Code before and after ZZP 1.0 PCM - Chevy Cobalt SS Forum : Chevrolet Cobalt SS Forums
 
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post #1 of 1 (permalink) Old 10-30-2016, 09:07 PM Thread Starter
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HELP : PO172 Code before and after ZZP 1.0 PCM

Okay guys... So I have a 06 Cobalt ss/sc 2.0l with Full header, Catless downpipe, catback magnaflow exhaust and stage 2 pulley & 42# injectors. So, Ive had this code (PO172, running rich.) pop up multiple times before I bought this PCM and now, it has just popped up again after. The CEL does not pop up, and turn off itself as often as it did before the new PCM from ZZP was installed, but in order to pass emissions here in Maryland... I need this light to stay off for at least a week and for good, not just for the emissions test but also because I hate looking at it on the dash haha. But anyways, how should I go about it... Call ZZP and explain the situation, send it back, let them adjust the tune accordingly, and try again or should I look for a local tuner? (I do not want to spend the $ for a professional tune just for the light because the car runs amazing, although if its what I have to go to I will) I just believe the car must be running fat in high rpms because the car will not idle back down to 900rpms until fully stopped... it will hang right around 1000-1400rpm when I throw the car in neutral to come to a stop. There for should I see what ZZP can do first, call a professional around here or something else I should take a look into first?... I can do everything myself but tune so this is a call for help for my next move. haha Thanks!
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