check engine on.code p1166 present on 2002 Acura RSX

i have a 2002 rsx,check engine light is on.code p1166 present.i can clear code with scan tool nd as soon as vehicle is started the code sets

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1 answer
P1166 is a AF sensor heater circuit is bad. Bank 1 Sensor 1
Follow these test procedures
http://www.acuraworld.com/forums/f27/trouble-code-p1166-85027/