Hello All! My check engine light is on most of the time and a test indicated: 'Fuel Trim Malfunction Code P0170'. Can anyone tell me which sensor this one is? Thanks!

 

First thing to do is clean the MAF, and reset the lamp. If that fails and the lamp goes on again,you probably will have to replace the MAF. Shop around on Ebay. I had the same problem, and found a newBosh unit for $139. It fixed the problem.

 

ONLY fit an exact Bosch or MB MAf or insert.not a clone[:@]

Bazzle

 

I'm sorry, but, what is the MAF? And where is it?

Thanks!

 

P0179. Fuel Trim Bank 1.
Likely MAF. Mass Air Flow meter. Usually gives problems at 70k miles+

4 or V6/V8 engine?

Read previous posts (numerous t6hreads present). This is an extremely common MB problem.

Stuart.

 

Where did you find you MAF or Air Mass Meter? All the ones I find are $249

 

MAF pix for a LHD, don't buy ebay junk!!!!





[IMG]local://upfiles/28125/13344C71088F481080A65F2EC2927472.jpg[/IMG]

 

As Bazzle states. Only buy from MB unless you like living dangerously.
Cheaper "alternatives" do exist BUT...

Some people have had good experience (saved a few dollars) others have had bad experience... on going (different but related) problems.

I recommend using genuine parts but DIY. 5 min job. No special tools, coding, etc etc. just read this forum for details of how to remove air cleaner (subject to model) etc.

Stuart