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The 2106 code and 61b code are both for Electronic Throttle Body problems. There have been many problems with the throttle bodies going bad. What I first recommend doing is having the computer re flashed by a Ford dealer. There are technical service messages out from Ford to first reprogram the computer before replacing any parts. The 2197 code is for a stuck lean oxygen sensor on the drivers side, next to the exhaust manifold. More than likely the sensor is bad and needs to be replaced.