BenzWorld Junior Member
Date registered: Apr 2006
Vehicle: 98 ML320
Location: Charlotte, NC
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OBD2 Codes: P0170, P0173, P0400...Anyone had before?
According to AutoZone:
P0170 and P0173...
The PCM has determined that during testing, the fuel compensation valve for bank 1 [and two] exceeded the specified range.
The PCM has determined that malfunction exists in the exhaust gas recirculation flow.
It was at the dealer [Beck Imports - Charlotte, NC] a few weeks ago to diagnose a fuel/exhaust odor, loose steering, and excessive engine vibration. They called me an hour or two later to tell me that the only thing wrong with my car was bad engine mounts. I can live with the vibration for $460. I knew there was something wrong with it still, so I went to my school and borrowed their lift. Immediately I noticed a small exhaust leak (maybe?? definitely notice carbon buildup) just ahead of the muffler and busted tie-rod ends. I checked and it had the correct part number for the (still) wobbly harmonic balancer. I felt the cats and didn't notice any cracks in them. ~~Long story short~~ Called dealer's service manager...brought car back...they agreed with me about busted tie-rod ends, and said I didn't have an exhaust leak, but it had an oil leak that needed to be fixed. I specifically asked the guy on the phone if the oil leak would be the cause of the exhaust smell, and he said yes. I let them fix that, and it seemed to make the problem hit or miss enough to where I would have a difficult time getting them to notice it, so I've let it pass until now.
This week the exhaust smell came back more frequently and today the engine light came on with those codes? I can't "see" anything wrong, but I can definitely smell exhaust coming from around the engine area (mainly right side). What part swaps do those things entail? Any help is appreciated [:)]