how to diagnose and fix a 214 code for 1994 ford escort 5 speed station wagon

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have a 214 code for 1994 escort 1.9l 5 speed station wagon. Car runs well, but jerks when giving or letting off of the gas. Have to do it very smoothly so it does not jerk. What is the problem and how to fix it? Have read a little and others say it is a camshaft position sensor. Is this correct? How to fix?