P0132 - O2 Sensor Circuit High Voltage (Bank 1, Sensor 1)

1998 Dodge Durango. 5.2l V8, auto tran, approx 107k miles

Had a cyclinder 8 misfire code. Changed plugs and wires. No more misfire code.

After changing plugs and wires, get PO 132 - O2 Sensor Circuit High Voltage (Bank 1, Sensor 1).

Chilton shows O2 sensors on top of driver side exhaust manifold and behind cat convertor.

I can't find sensor on exhaust manifold. Maybe I'm blind, but I just can't find it.

Truck is really running rough, sluggish, bogs down under acceleration.

Any help would be greatly appreciated.

Thanks.

Dan

I think there is only 2 sensors, 1 before , 1 after, if there's 3 then the upstream should be just beneath the manifold flange in the pipe

Thanks, Jeff, I found them. The first is on exhaust pipe just before Cat Converter and second is on exhaust pipe just after Cat Converter.

Changing them should be pretty straight forward, I think.

What would cause the high voltage signal, though? The wiring for the second O2 sensor looks like the insulation has melted. Will it need replacing, too?

Any advive is greatly appreciated.

Dan

depending on the mileage I normally recommend replacing 02's in pairs, keeps things fresh you might say between the frt and rear of the cat and it can avoid alot of other codes that can be caused by a lazy 02 teamed with a new one. I'd recommend dealer parts unless the price is way different, some jobber 02's aren't so good. The high voltage signal could be caused by a heater issue with the 02(s) themselves or maybe the rubbed wire? High voltage often means open circuit on the heater circuit because the pcm sometimes substitutes a value. Be sure they are no blown fuses for the heater circuit and that the plug at the 02s are getting the proper voltages and grounds, I have seen some wiring issues on those trucks up around the bellhousing while working at the dealer

Good luck and keep me postted

Jeff

Thanks again, Jeff.

My boy, his friends, and I will be looking into this prob tonight after he gets home from work.

Dan