Check for exhaust leaks and intake leaks. If no leaks, consider giving the pcm a few more drive cycles to calibrate to the new sensor.
SOURCE: I'm getting code P0138 on '99 Ram
Could be just the sensor, could be a bad fuse, or could be bad wiring. Change the sensor, check the fuse, and check wiring, or reverse order.
SOURCE: P0420 and P0430
The AF sensors are uupstream and the O2 down stream. The car' s computer tests them and it is saying your cats are bad. If you have a scan tool you could look at the data and see what the sensors are seeing. The Af sensors are the ones that control the fuel ratio in the car while the O2's just watch. AF's would be the one to change but there is no garuatee that the codes won't come back.
SOURCE: how do i locate o2 sensor on 2003 dodge ram 1500
Which one? They are in the exhaust pipes under the truck. Only wires going to the exhaust.
SOURCE: P2097 Error code in 2006 Dodge Grand Caravan, which O2 Sensor?
The one before the catalytic, on the side where cylinder # 1 is at. close to the exhaust mag.
SOURCE: How do you delete catalytic
Than you will need to purchase a O2 Simulator that replaces the downstream o2 sensor and fools the computer into thinking the cat is there and working. There are several companies that make these. You can google search ( "O2 simulator" ) for these items and decide which one would work best for you.
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