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P0173 Diagnostic Trouble Code Discussion for November 2004

Fuel Trim Lean Or Rich (Bank 2)

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Trouble Ticket Help Requests for DTC P0173
Help Request Posted
1998 Mercedes-Benz ML320 3.2L MIL Lamp on VIN: 4JGAB54E4W
P0173: fuel trim. ... trim codes p0170 and p0173. O2 sensor readings look normal and can't find any vac or intake leaks. Customer was told by dealer they needed a 800.00 mass air flow sensor but I haven't been able to verify this diagnosis. Has anyone seen any bulletins on this...
November 06, 2004