silvergts1998

Does anyone know what this code means and what might be the issue? Is it the O2 Sensor? (Post Catalyst Fuel Trim System Too Lean Bank 1)

Thanks in advance.

ohlord

as it relates to a specific Mercedes code is a self adaptation code lean below limit at idle.
left bank which since they go from the drivers side that is bank2 drivers side

could be pre cat o2 sensor air leak maf any other codes or running issues?
if no running issues erase the code with your scanner
and do this
with a cold engine ie in the morning
start the car let it sit and idle for 20 minutes with no accessories on no radio blower heat
then shut the car off for a few minutes and repeat
this will allow the idle self adaptation to set itself.
if the system still has enough room to self adapt.
if the cel comes back at the cost of parts for that engine best to get it on an SDS scanner at a good mb indie shop and locate the culprit.

silvergts1998

Thanks for the help. I will try what you wrote. No other codes. It did throw two codes but both codes where the same.

nanayaw6

Reviving an old thread but did the recommended procedure work? If not what did?