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P0172 Diagnostic Trouble Code Discussion for May 2021

Fuel System Rich (Bank 1)

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Trouble Ticket Help Requests for DTC P0172
Help Request Posted
2012 Chevrolet Silverado 2500 HD LT 6.0L Excessive Emissions, MIL Lamp on VIN: 1GC1KXCGXC
P0172: too rich bank 1. Have this fine used truck from used car lot here.Have rich bank 1 and 2 codes,we replaced maf due to reading out of range test drove and it passed the rich running tests in mode 6 data, Customer returned with cel on again with same codes. Here are my readi...
May 07, 2021
2015 Honda Fit EX 1.5L MIL Lamp on
P0172: Runs Rich Bank 1. Car runs fine but shows rich. From what I've read, The Cylinder A/F test is marginally accurate at best. I don't have a lot of experience with GDI and am looking for direction on diagnosis. Identafix and other sources suggest valve adjustments and Injec...
May 12, 2021