1994 E320 Code 3 returns! AHHH!
#1
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I can't believe it! After replacing the O2 sensor last fall, the CE light stayed off for 6 months. Then, lo and behold! It's back on again! AHHHH!
Code 3 again (faulty Lambda control). OBD1 sucks!
Any help would be appreciated. Could my O2 have gone bad that fast? I have NO vaccum leaks. Car runs great but not as good on gas as before, exhaust smells a little. Any help appreciated greatly.![Roll Eyes (Sarcastic)](https://mercedesforum.com/forum/images/smilies/rolleyes.gif)
Thanks
![EEK!](https://mercedesforum.com/forum/images/smilies/eek.gif)
Any help would be appreciated. Could my O2 have gone bad that fast? I have NO vaccum leaks. Car runs great but not as good on gas as before, exhaust smells a little. Any help appreciated greatly.
![Roll Eyes (Sarcastic)](https://mercedesforum.com/forum/images/smilies/rolleyes.gif)
Thanks
![Embarrassment](https://mercedesforum.com/forum/images/smilies/redface.gif)
Last edited by RPuerini; 07-01-2010 at 09:44 PM. Reason: Car model missing
#4
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Thanks.
In the meantime I had taken the o2 out and cleaned it with maf sensor cleaner, but noticed it was about 90% tightened so I tightened it back up all the way. Also I cleaned the MAF sensor at the same time.
The light hasn't come back on since (been 6 days now). So it could have been either the wires were wet, the O2 wasn't tight enough or the MAF sensor was dirty (or the O2 was contaminated?). All I know is the light is off for good this time. Your posts are very reassuring.
Thanks!![Big Grin](https://mercedesforum.com/forum/images/smilies/biggrin.gif)
![Big Grin](https://mercedesforum.com/forum/images/smilies/biggrin.gif)
In the meantime I had taken the o2 out and cleaned it with maf sensor cleaner, but noticed it was about 90% tightened so I tightened it back up all the way. Also I cleaned the MAF sensor at the same time.
The light hasn't come back on since (been 6 days now). So it could have been either the wires were wet, the O2 wasn't tight enough or the MAF sensor was dirty (or the O2 was contaminated?). All I know is the light is off for good this time. Your posts are very reassuring.
Thanks!
![Big Grin](https://mercedesforum.com/forum/images/smilies/biggrin.gif)
![Big Grin](https://mercedesforum.com/forum/images/smilies/biggrin.gif)
![Big Grin](https://mercedesforum.com/forum/images/smilies/biggrin.gif)
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