Quote:
Originally Posted by tommyp
Hello again, its been awhile since ive dealt with my O2 sensor on the 190 but it is still not working and I have an emissions test coming up.
The sensor was not heating so I switched the white wires orientation but still no luck. Its throwing the same 5 blink code. Is there another link in the o2 sensor system that could need replacing?
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I saw that post and it is wrong in my opinion, first the two wires are part of a continuing circuit, they are white those two wires run the heater in the ox, makes no difference in position, now to clear up another item, the heater gets its power from the fuel pumps you will not get heat until the engine is running. The third wire is black and it connects to the green wire, this is the signal wire for the EHA. clear each code after you have read them and all should work. I just finished this on my wifes 190E and will post every thing I did in a couple of days, it might help.