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Old 10-14-2009, 05:08 PM
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Join Date: Jul 2009
Location: Ontario,Canada
Posts: 10
O2S 1 voltage too high, circuit open?

Just took the error code from my 93 300e - pin 8 - 9 blinks. From what i can see it means -
O2S 1 (before TWC) - voltage too high, circuit open or voltage implausible

Can anyone tell me exactly what this means and whats the fix?

I have looked, but cant find the answer.

Thanks in advance!

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