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  1. #1
    Thomas Meacham
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    Error Code P0170 and P0173

    What is the most common cause of this problem.

    1. Leak in Intake Manifold??

    2. Bad O2 Sensors?

    3. Bad Gas

    4. I'm Just Plain Stupid????

    Thanks

    2001 ML320 62000 miles



  2. #2
    Steve Dinger
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    Re: Error Code P0170 and P0173

    We have the same reading on our 2000 with 37000 miles. It sat for quite a while before we bought it and a mechanic friend said the gas may have gone bad. We ran fuel injector cleaner through it and the engine light went out for a while, but came back on. Anyway, did you ever find the cause and cure for yours? Any advice would be appreciated.
    Steve

  3. #3
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    Member No: 52039 m3tonyh is an unknown quantity at this point m3tonyh's Avatar
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    Re: Error Code P0170 and P0173

    Those codes are adaptation codes-repl air mass meter and reset adaptations-if you have SDS laptop-if not light may come back on depending on how quickly ME brings the adaptations in line.

  4. #4
    Test
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    Re: Error Code P0170 and P0173

    Same thing happened to me and I had to replace MAF sensor. $270 from the dealer.

  5. #5
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    Member No: 45333 chuckl is an unknown quantity at this point chuckl's Avatar
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    Re: Error Code P0170 and P0173

    fuel trim banks 1 and 2

  6. #6
    Vern
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    Re: Error Code P0170 and P0173

    Just had the engine light go on in my 98 ML320 at 62000 miles. AutoZone determined P0170 and P0173. Any new info rather than the Mercedes dealer ($195 diagnostic fee but applicable towards repairs). I topped off gas tank and added injector cleaner. help....

  7. #7
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    Re: Error Code P0170 and P0173

    I just had mine fixed by the dealer. Replaced 2 sensors. Fortunately the cost was covered by my private extended warranty. I have 79,000 on my ML320 2000

  8. #8
    P Bevilaqua
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    Re: Error Code P0170 and P0173

    The most common cause for the P0170 code is a loose gas cap! You have to turn it until it clicks. I know this and sometimes still don't tighten it enough.

    Before you do anything else, check the gas cap. This is a very profitable problem for unscrupulous mechanics! Tighten the cap, claim the "tripronged bifurcator" had to be replaced, charge $400!

  9. #9
    Glen
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    Re: Error Code P0170 and P0173

    The P170 code is a bad mass airflow sensor, so every one with that code should Check that. That's what is was for me on my ML320.

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