1994 Mercury Tracer

Engine Mechanical problem
1994 Mercury Tracer 4 cyl Front Wheel Drive Automatic 74,488 miles

This car suddenly stopped running one day. I checked the fuel pump (it's pumping fuel), replaced the fuel filter, Checked the internia switch, and replaced the Throttle Position Sensor but the car still won't start. The " Fuel Cut Off" light is on and the " Check Engine" light is on. What should I look for now or do to properly diagnose this problem. I hooked a voltmeter to the diagnostic terminal and got a code " 133" but there's no trouble code 133 in the shop manual. I don't want to continue with my " hit and miss" method of fixing this problem. Can you give me some advice? Thanks.
June 1, 2009.

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