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My 2003 F-5 has a constant flashing check engine light. The machine runs fine. The label with the codes is not on the air box and I never got the owners manual with the unit. The same code on my F7 indicates the unit is running hot? Any ideas...could it be a sending unit gone bad?
 

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mine did the same exact thing, the exhaust sensor . ran mint no problems at all, just the check engine light blinked constant. had the cat dealer put it on the checker-faulty exhaust sensor. put a new sensor in it, no light no more.
 
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