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Rought Idle... Error Code PO174

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Old Oct 6, 2009 | 07:53 PM
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Rought Idle... Error Code PO174

I have an 03 Expy that started idling rough and the check engine light came on this morning. I checked the code and it reads System too lean Bank 2... any help on how to fix this would be appreciated.
 

Last edited by kcmark; Oct 6, 2009 at 07:53 PM. Reason: Sorry, should read rough idle
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Old Oct 6, 2009 | 08:10 PM
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Check the PCV valve hose elbow at the firewall.
 
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Old Oct 6, 2009 | 08:11 PM
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You have a vacuum leak. Check the PVC elbow and hose at the top rear of the engine for cracks or breakage.
 
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Old Oct 6, 2009 | 08:20 PM
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Thanks.. I will check when I get some daylight and let you know..
 
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