CEL--Code 0173
01-04-2012, 09:44 PM
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CEL--Code 0173
After service last week at the dealer on my E350, I got a Code 0173 today on my reader. Fuel Trim Malfuction (Right Bank). Any idea of what this means and what is involved?
01-04-2012, 10:20 PM
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Bad MAF or 0^2 sensor is my guess. You're not running oiled aftermarket air filters by any chance, are you?
What was it in for service for?
What was it in for service for?
Last edited by Benz-O-Rama; 01-04-2012 at 10:23 PM.
01-04-2012, 11:08 PM
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Thanks. No, running stock filters. I had the "regular" fancy oil change and inspection service, and replaced thermostat and rear brake pads. Also had oil leaking onto the exhaust which was fixed.
