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Code P0171, vacuum line replacement instructions needed

Tiny
JUAN GONZALEZ4
  • MEMBER
  • 2005 MERCEDES BENZ C230
  • 208,086 MILES
Advance auto parts scan shows a problem on the crankcase breather and auto zone scan shows a code P0171 system too lean (Bank 1), but I notice couple vacuum hoses broken, can you please show me how to fix them?
Thursday, July 23rd, 2020 AT 5:16 PM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Clearly vacuum leaks will cause this issue so you are on the right path. As for showing you how to fix these lines, that may be easier then you may think. Normally vacuum lines can be replaced with bulk line so I would suggest getting a couple of pictures of the lines that you found broken and we can try and identify the line and then all you need to do is follow it from end to end and replace it and then secure it back it place.

Let's start with some pictures and go from there. Thanks

https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers
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Thursday, July 23rd, 2020 AT 5:30 PM

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