Thread: Check Engine Light with code PO173
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Old Aug 10, 2016 | 11:07 PM
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Franc Rauscher
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Joined: Mar 2008
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From: St Louis MO
Default Re: Check Engine Light with code PO173
Originally Posted by Rpaczan
According to the Mercedes forum, the most common issue for the P0173 is a failing mass flow air sensor. I believe the OEM Bosch part is $145 from Autohaus or $100 on Amazon:
https://www.amazon.com/Bosch-0280217...sch+0280217515

Agreed,
I'm on my third one at less than 60K on the clock


Yeah it is common.
 
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