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Why are all of your o2 sensors bad on your 97 Mercury Mountaineer?
Wiki User
∙ 15y ago
I'm not a mechanic / technician but I noticed in the power distribution box in the engine compartment of a 1997 Mercury Mountaineer that mini - fuse # 11 ( 20 amp ) is for the HEGO system ( heated exhaust gas oxygen ) sensors The PD BOX is " live " - it is recommended to disconnect your battery cables before servicing anything in the PD BOX
Wiki User
∙ 15y ago
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