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What does the P2196 code mean for my Ford Escape?
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If your Ford Escape is displaying a P2196 OBD-II diagnostic code, it means there is an issue with the oxygen sensor located before the catalytic converter. Ford describes it as "Oxygen Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1," indicating that the sensor is detecting a rich exhaust from the cylinders with the number one. Factors that could lead to this problem include faulty fuel injectors, intake air leaks, vacuum leaks, and electrical issues such as poor connections or wiring problems. Additionally, for Escapes made before March 2011, there is a Ford Factory Service Bulletin, TSB 12-3-19, that mentions a potential problem with a leak or malfunctioning evaporative emission purge valve that could trigger the check engine light.
More answers
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In the Ford Escape and other cars, a P2196 code indicates that the computer is detecting an excess of fuel in the exhaust system, known as running rich. It may occur during the computer's fuel map re-learning phase after a reset, but could also signal a more serious issue requiring attention from a qualified mechanic.
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