I have a 2003 Chevy 2500 cargo van, cranks over but won't start. any suggestions? PO 172 Code bank 1.?

Question:
Says system too rich

Answers:

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well if the o2 sensor is bad the van should start only thing left is check fuel pressure and and spark

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good luck i have an asro van that is stalling while im driving. they sure dont make cars like they used to.

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Check to see if you have got fire at plugs. Also check to see if fuel pump is working. Distributer and fuel pumps are common for going out in those.

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This code PO 172 will not keep it from starting.ck its vital signs spark and fuel pressure

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