97 E320 - Error Code - Po174 Fuel Trim - Mercedes-Benz Forum

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post #1 of 1 (permalink) Old 04-23-2007, 04:30 AM Thread Starter
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Date registered: Apr 2007
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97 E320 - Error Code - Po174 Fuel Trim

I have been having this problem where the check engine light comes on when the gas tank is less than half or so. Does it have to do with the fuel tank cap or is it as straight forward as replacing the air mass sensor or is it much more complex and expensive repair.

Please help. All suggesstions. comments appreciated.

97 3e20 - 160k
skjothi is offline  
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