Probably won't need to pull codes as I think you've just solved the problem. Front driver side tire is different size 215/40r17 and all the others are 215/45r17. Once I get tire replaced I should be good, hopefully.

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1990 190E 3.0L

Well its always good to have early resolve. The 40 tire would turn at 874 revolutions per mile and the 45 at 844 - 3% dif. There is probably enough error at 70mph to trigger the fault.

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