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P0133 code which sensor do I replace?
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asked
Nov 9, 2018
by
Greg
I just replaced both O2 sensors upstream and downstream. Still getting P0133. Is there another sensor? If so where is it? Thanks.
Vehicle:
2000 Buick Lesabre 3.8 litre
p0133
ho2
sensor
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Nov 9, 2018
by
Carguy1
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HI there,
These are the only sensors, however there may be a power issue to the front sensor. In the fuse box under the hood there is a fuse for the front sensor. OXY sensor fuse. If the fuse is good, then it's possible there is a wiring issue, either a broken wire or short to power.
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