Possible Vacuum Leak

2007 MERCEDES BENZ C230
62,000 MILES • 6 CYL • 2WD • AUTOMATIC
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SAHEED87
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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.
Aug 23, 2011 at 6:02 AM
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HMAC300
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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.
Aug 23, 2011 at 1:06 PM