well, if you are interested in emissions info, the em plus has 02 support. i think it also has a few data bits on the egr functions (or 'readiness').
if you wanted to know transmission temp & maybe some other parms, the mx is the way to go, BUT i am fairly certain that rangers never came with a transmission temp sensor.

i think i'll get the em plus later on (slight hope on solving my p1401), and retire my v1.2 to my cobalt.

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1999 xlt 2.5l 5-speed Supercab 159k
83 diesel 2.2l na
06 F250 6.0l psd
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