Possible Vacuum Leak

Tiny
SAHEED87
  • 2007 MERCEDES BENZ C230
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 62,000 MILES

I have a 2007 Mercedes C230 and the check engine light came on reading the codes P0170 and P0173. (Fuel trim bank 1&2 malfunction.) I hear hissing under the hood and assume a vacuum leak. Any suggestions as if this is correct and possible solutions? Thank you.

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Tuesday, August 23rd, 2011 AT 6:02 AM

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Tiny
HMAC300
  • EXPERT
  • 45,734 POSTS

Check for hoses being off or cracked. Choke cleaner works good if yo don't find a hose off, spray it around where you hear the hissing. Usually rpm will change when you find it.

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Tuesday, August 23rd, 2011 AT 1:06 PM

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