Need help with codes
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Joined: Mar 2018
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2011glk350
Need help with codes
Hello all this is my first post and I am having trouble diagnosing engine codes on my 2011 GLK350. It is throwing both banks running rich, is this a common issue with the M272 engine? I have some live data showing long term fuel trim for both banks over -20%. I will see if I can upload them. Is this as simple as the MAF being dirty or is it deeper than that? Hoping to get some advice before I get too deep.
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Joined: Jul 2012
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From: WI
GLK 250
Search is your friend: https://repairpal.com/OBD-II-Code-P0172-and-P0175
I would look closely at the MAF readings, coolant temps, fuel requested/injected all while driving, to verify those important parameters. Try to avoid clearing the codes until after you have detected the potential problem(s) and attempted a fix.
Report back your findings.
I would look closely at the MAF readings, coolant temps, fuel requested/injected all while driving, to verify those important parameters. Try to avoid clearing the codes until after you have detected the potential problem(s) and attempted a fix.
Report back your findings.
