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Old 09-04-2013, 11:31 AM   #1 (permalink)
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Default Can bad oxygen sensors cause issues with the transmission?

I have a 2002 Taurus and am looking for some directions. We replaced the split hose going to the pcv valve a couple of months ago. At that time when the codes were pulled the oxygen sensors where also a suspect. We did not replace them at that time. Now the car is getting really unreliable. When the car is driven first thing in the morning it is not wanting to go into a gear. Once it decides to shift it will shift in/out of the gear several times. It will run once it gets going but I have noticed when I slow down to turn a corner it takes a few seconds for the transmission to shift to another gear. This transmission was rebuilt in Feb 2012. The other night going down the interstate the exclamation light started flashing. When I restarted the car after getting to my location the light went out. Also I have noticed that when I am stopped the speedometer is jumping occasionally. Can all this be caused by the oxygen sensors?

thanks for any help.
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Old 09-04-2013, 11:38 AM   #2 (permalink)
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Sounds like a vss issue.
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Old 09-04-2013, 11:39 AM   #3 (permalink)
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No! this is a transmission problem. The exclamation light means the Trans oil is hotter then it should be. You, have a transmission problem. I would take it back to the shop and have them check it out. Good luck!
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Old 09-04-2013, 12:11 PM   #4 (permalink)
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If light is coming on get codes pulled

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Sounds like a vss issue.
Right neighborhood but wrong door, no VSS, '02 uses transmission speed sensors.
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Old 09-04-2013, 12:50 PM   #5 (permalink)
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So use to working on the olders cars i guess lol. Hopefully, that transmission has a warranty.
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Old 09-04-2013, 12:55 PM   #6 (permalink)
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^+1
The VSS is like the IAC, it is so often a culprit we do it as a reflex
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Old 09-04-2013, 01:38 PM   #7 (permalink)
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A quick basic question, did you check the fluid level? Mine had trouble going into gear early in the morning, but once I topped up the fluids, it was fine. Sounds like you might have other issues also.
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Old 09-04-2013, 07:12 PM   #8 (permalink)
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I have checked the fluid and it is fine. Of course the transmission is out of warranty. I guess the next step is to have the codes pulled. Wasn't sure there would be codes since no warning lights are on. Thanks for all the help.
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Old 09-04-2013, 07:56 PM   #9 (permalink)
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The CEL flashes for serious problems. (Danger, Will Robinson)
Codes will be stored. There called pending codes.

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Old 09-04-2013, 08:12 PM   #10 (permalink)
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I have checked the fluid and it is fine. Of course the transmission is out of warranty. I guess the next step is to have the codes pulled. Wasn't sure there would be codes since no warning lights are on. Thanks for all the help.
If that light flashed codes are stored
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