ertech

Hi Guys I removing the charcoal air filters on my E63 and got a CEL.stock air filter. is this common?I put the charcoal filters back rest the codes and all good. I did not reset to ECU after removing the filters . can this be the problem?
Thanks

Peter_02AMG

No charcoal filters for 2 yr now and no CEL.

TTMotorsports

Reset the ECU adaptions and you will be good to go.

If you do get the CEL again then:
1) the air filter is pinched(1.tighten ALL the air box screws until they START to get tight 2. then go back and fully tighten all of them starting from the first one)
2)the MAF gasket isn't sealing properly
3)you dislodged the bottom of the y-pipe from the intake plenum going to the throttle bodies when you removed the air boxes.

ertech

I think the pedal thing does not work to reset the ecu on a 07 . what is the easist way to reset it?
Thanks for the good tips
ps: I did not remove the airbox just lifted it and took them out

TTMotorsports

Reset must be done with a SDS.

When you just lift the air boxes up to remove the filters, there is a chance you have dislodged the y-pipe. Check it out. There are 2 plastic clips that attach the bottom of the y-pipe to the backside of the intake manifold plenum.

I Like Soup

I swapped my filters out for K&N's and the CEL comes on occasionally.

shooter

So I know removing the charcoal filters will increase air flow, but what are we giving up? What do those filters actually do for the air going into the engine?