MAF Replaced, Still getting P0170/P0173?
Thread Starter
Newbie
Joined: Nov 2013
Posts: 7
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2007 C230 Sport
MAF Replaced, Still getting P0170/P0173?
About three years ago I had this issue and replacing the MAF did the trick. Naturally when the codes came up last week it was my first choice again. I cleaned the MAF and codes returned. I've now replaced the MAF and the code has also returned. Can anyone help me with my next step? I'm hearing O2 sensors, vacuum hoses, etc. but don't want to start indiscriminately changing parts. Thanks in advance!
Thread Starter
Newbie
Joined: Nov 2013
Posts: 7
Likes: 0
2007 C230 Sport
Wow
Would have been better to at least offer some advice rather than diatribe. I'm an avid DIY'er and ex British Leyland tech (years past) but currently retired. Like almost everyone else here in the forum, we enjoy trying to help ourselves before we go to the dealer (or stealer if you prefer) for service. I probably have $4k in tools and love to use them, I hope you can when you're retired and I hope you never need help, or at least if you do, I hope you find someone a little better than you are at communicating. Remember, this is about advice and helping each other. Apparently you haven't figured that out yet. Prayers.
Junior Member
Joined: Jun 2015
Posts: 46
Likes: 9
2011 GL450
The intake manifolds on those were cast really thin in spots. You may have to borrow/ manufacture a smoke generator to find the leak. They are pretty simple to make with parts off ebay. There are probably youtube videos as well. Just plug the hose into a manifold vacuum port start smoking. Most that I have seen are at the right rear corner of the manifold. With any luck, it'll just be a bad vacuum line or something else cheap.
