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Which o2 sensor do you replace for DTC too lean bank 1 and 2 - Taurus - Sable?
Wiki User
∙ 10y ago
Question: if your child has a temperature, do you replace the thermometer that told you the temperature, or work to find out WHY the kid has a fever?
A DTC (diagnostic trouble code) reporting a *lean* condition is telling you there's more AIR in the fuel mix than the computer was expecting.
In other words, air is sneaking / leaking into the engine - for example, a vacuum leak or leaking intake valve seals (which is common on Windstars).
A little more research into the 171 and 174 codes specific to the Taurus/Sables will avoid unnecessary 02 sensor replacements...
Also highly unlikely that both sides would have a failed O2 sensor at the same time, just common sense....... many things can cause a lean condition , even a weak fuel pump or plugged fuel filter , MAF sensor, injector seals and on, and on.
See "Related Questions" below for more
Wiki User
∙ 10y ago
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