SOURCE: i have the trouble codes for my 2004 ford foucas..how do i fix the problem?
Well all three codes are for a problem with the heater circuit for the O2 sensors. And since all three sensors are not going to fail at the same time, I would assume the problem is in the wiring or the source of power for the heaters.
You'll have to find someone with a shop manual or buy a used one online to get the testing procedures.
The sensors each have a heater to allow them to start reading exhaust gas as soon as you start the engine.
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