Repair Safety Notice:
This information is for general instructional purposes only. Vehicle repair can be dangerous.
Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
and consult a qualified repair shop when needed.
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JDL
CAR REPAIR CONTRIBUTOR
16,098 POSTS
Hello, the location of the up-stream sensor should be under the hood, center, backside of engine, in the exhaust. The heater is part of the sensor. The dark green wire with orange tracer is voltage for the sensor heater.