I am curious about what the O2 sensor's "calculated trim" is. My short term fuel trim hovers around 0 as it should and the long term trim is at 19. The front O2 sensor's calculated trim is 64. What does that mean? I don't have any trouble, I am just curious what it means.

By watching the long term trim and the O2 trims can anything be determined about the "health" of the MAF sensor or the O2 sensors?

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra