CEL Check Engine Light (Yellow on the dash board, comes on for a few seconds when you turn on the ignition, if it stays on then you have a CEL code. Sometimes you could have CEL code without the light)

MTX manual transmission

ATX Automatic

For more,

http://www.contour.org/FAQ/FAQ.php?s=terms

"Always do the cheap and easy ones first." 1996 V6 ATX 96K miles