P0170 and P0173 error codes
 

1999 C280, 95K miles.

I have pulled the P0170 and P0173 error codes from the computer. At the same time, while I was driving with these codes, I didnt notice anything out of the ordinary until the car began to occasioanlly surge (a little below red line) for a small gas pedal depression, and a driver's side cylinder misfire (Cylinder 4,5,6) error code. I noticed this one, it bucked terribly.

I am tempted to replace the MAF, I have done some cleaning with a MAF cleaner, but no change. I have replaced spark plugs, air filter, and fuel filter. One thing that has me worried is that the passenger and driver's side floor is getting warmer than usual. Could the catalytic converters be warming up too much?


Any ideas will be helpful.

RE: P0170 and P0173 error codes
 

replace the mass and the air filter. the mass goes bad all the time

RE: P0170 and P0173 error codes
 

I have a 1998 C230 with the same problem, changed plugs and cleaned MAF. No difference. Changed the MAF, drives like a new car!;)

RE: P0170 and P0173 error codes
 

Thanks. I did the same thing. I have ordered the MAF. Will changed it this weekend and drive around like crazy to gauge it.

RE: P0170 and P0173 error codes
 

Can you please tell me how the MAF (when changed) made a difference? In fact, what does MAF stand for?

I appreicate it,

Vince

RE: P0170 and P0173 error codes
 

>>In fact, what does MAF stand for?<<

The Mass AirFlow (MAF) sensor. There are a couple of other names that are used like the mass air sensor, etc.