complicated O2 sensor problem.
#1
complicated O2 sensor problem.
Ok, my engine light came on a while go and i decided to check it now since my inspection is coming up. I have a 95 240 se with an obdII and using the obd2 checker got front o2 sensor problem. Got that replaced, o2 problem is still coming up. I following the procedure on how to check the if there is any grounding issues using the fsm procedure, and found out that i have wiring problem. So after all the jebbar jabber, has anyone ever had this problem or know how to deal with it? Unplugging the ECU and the oxygen sensor wire, checking between the ecu and ground continuity exists (not good).
Any help would be appreciated.
O yeah, i already searched for this topic in couple of forums.
Any help would be appreciated.
O yeah, i already searched for this topic in couple of forums.
#2
did you reset the ecu after the o2 sensor was replaced.
a friend of mine has a 2000 contour that had his cel come on. it was a bad o2 sensor, so he replaced it but the light stayed on. i reset the ecu and no more light.
a friend of mine has a 2000 contour that had his cel come on. it was a bad o2 sensor, so he replaced it but the light stayed on. i reset the ecu and no more light.
Last edited by jramosthe1st!; 06-11-2007 at 10:02 PM.
#5
The single wire from the oxygen sensor has a shield around, i believe, which is grounded and the sensor uses its body as ground to close the loop. So, i don't know what you mean by getting a new ground? You mean to take out the shield ground?
#6
Never mind I thought you were talking about the second sensor that plugs into the harness after the CAT. I missed the part where you said front sensor...
Last edited by BigVinnie; 06-12-2007 at 09:49 AM.
#8
#9
It worked. The ground terminal on the engine that is used to ground the shield for the green wire (oxygen sensor wire) was removed and engine light disappeared. I'm just going to cover the terminal with electric tape and the won't have any problems with it, hopefully, since it is only a ground for the shield.
Thanks for the tip bigvinnie.
Thanks for the tip bigvinnie.
#10
It worked. The ground terminal on the engine that is used to ground the shield for the green wire (oxygen sensor wire) was removed and engine light disappeared. I'm just going to cover the terminal with electric tape and the won't have any problems with it, hopefully, since it is only a ground for the shield.
Thanks for the tip bigvinnie.
Thanks for the tip bigvinnie.
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