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Thread: PO172 code after Cylinder Head replacement
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Old 12-24-2022, 12:16 AM
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Join Date: Nov 2021
Location: San Diego
Posts: 55
Real Name: Dave
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PO172 code after Cylinder Head replacement
I had a cracked cylinder head fixed and replaced the water pump, timing belt, fuel injectors (rebuilt). Also a few months ago I replaced the spark plugs and wires. I now have a PO172 code with System too rich bank 1. I cleaned the MAF and no help on the code. I understand one of the rebuilt injectors could be leaking fuel. How do you test for the bad one? Thanks Dave
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