I had a code that the 02 sensor was bad on my 3.8l 05 dodge grand caravan. I replaced it with a bosch o2 sensor I got off the internet and replaced it. The check engine light came back on so I went to autozone and it said that there was a high voltage on the sensor. I bought one from them and the check engine light just came back on. Anybody knows what is going on before I waste any more time and money?

 

Both o2 sensors were bosch, the voltage on the 02 was steady at around 5 volts, didn't go lower than 4.6. I think that for some reason the bosch o2 sensors don't work with the van. I just installed a denso, it was twice as much and I haven't driven it to see if the check engine light is going to come back on. I feel like i'm logging on a journal... does anybody know about bosch parts not working on a dodge?

 

I used OEM from the dealer when I changed them on my Durango. What code are you getting?

 

Bosch sensor doesn't work on ANY domestic and Asian vehicle, as far as I experienced. They are only good for German cars, and some older Ford.
For Asian and Domestic, only use Denso or NTK. I believe OEM chrysler sensor is from NTK(nickname NGK, the company that makes spark plugs)

I wonder why after so many yeah, Bosch doesn't fix the problem, since they are suppose to be one of the top part supplier.

 

I'm really scared now, I put a bosch water pump in... somebody tell me everything is going to be ok, that was extremely hard to do. I ended up putting in a denso oxygen sensor and it has gone over 300 hundred miles with no check engine light. I think the code was p0321 i thing but it read high voltage.

 

There is nothing wrong with Bosch waterpump, probably one of the best aftermarket water pump out there. Bosch is one of the highest quality part supplier, and they make A LOT of OEM parts.
It is just their O2 sensor that's not compatible. Also skip their spark plugs as well.