gooberff,
I had the same problem (minus the check engine light). Seems the documentation given to the mechanics say not to program the tire size into the TCM, that it auto-downloads this information from the PCM. Obviously, this isn't true as everything worked OK as soon as they programmed the tire size into the TCM.
That said, the new PCM seems to have eeked a bit more response out of my car.
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2003 PT Turbo Deep Cranberry \'R\' Package Stock + AutoStick
Came off assembly line 1/14/03 (Tuesday) between 2200 and 2300.
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