Need help with codes
03-17-2018, 01:03 AM
#1
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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.
03-27-2018, 03:56 PM
#2
MBWorld Fanatic!
I didn't see actual P0XXX trouble codes.
Is the Check Engine Light (CEL) on?
Post your actual trouble codes if so.
Is the Check Engine Light (CEL) on?
Post your actual trouble codes if so.
03-28-2018, 10:11 AM
#4
MBWorld Fanatic!
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.
