Took it to autozone to get the codes ran and it was "O2 Sensor Bank 1 Sensor 1 Slow Response". I asked the guy if this would affect my gas mileage and he said yes lol. So I now know my problem...Is this perticular Sensor easy to get to?

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1998 Ford Ranger

147,000 on chassis, 50,000 on engine.
3.0 v6 5 speed 4x4...4x4 don't work lol

What I hope to do- Paint wheels, new head unit, exhaust, fix four wheel drive.

Follow your exhaust pipe down from the engine to the catalytic converter. You'll see two identical sensors screwed into your exhaust. Disconnect the electric connector from the one closest to your engine and unscrew it. A special sensor socket with a slot in the side for the wire to protrude from or an open end wrench can be used.

Wait till someone else can reply and verify which one Bank1 Sensor1 is. But I'm reasonably sure of this. For now I just know it's a simple swap.

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08 4.0 Sport 4x4
Stock

i have a brand new oem one for 50$ if you want one.

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Looking for a professional retrofitter to add HIDs or LEDs to your Ranger? PM me if your looking to have work done, and have cash to spend.

For the 3.0 V6?Year 1998?

Also could this be why Im getting poor gas mileage? and my truck has more power when its cold? Cause I heard the sensor dont kick on until the engine is 145 degrees. Once my engine warms up, it loses power.

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1998 Ford Ranger

147,000 on chassis, 50,000 on engine.
3.0 v6 5 speed 4x4...4x4 don't work lol

What I hope to do- Paint wheels, new head unit, exhaust, fix four wheel drive.

if it is the blue one, i have one.

Your sensor is always reading as long as the sensor itself is heated, but your sensor is ignored until the pcm is running in closed loop fuel trim, which is about 145 degrees, so yes and no.

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Looking for a professional retrofitter to add HIDs or LEDs to your Ranger? PM me if your looking to have work done, and have cash to spend.