Hi, guys. I'm getting a CEL again and my code reader tells me its P2A00, "O2 Sensor Circuit Range/Performance Bank 1 Sensor 1".
Is this O2 sensor easy to reach so that I can clean it personally rather than bring the truck to the dealer? I believe there is one near the top of the engine that looks easy to access. Is that the one that is throwing the code? A photo would help, too. Thanks......

 

There are two O2 sensors in the exhaust, under the truck.
If I remember, there is one in front, and one at the rear of the CAT (the front tank in the exhaust) I never made since of Bank 1 and 2, as to which is which, But I would pull both, and clean them. One post earlier, said to use Simple Green. I used a Brush, Brake and Parts cleaner spray, along with compressed shop air.
I cleaned my O2’s before reinstalling them back into my new 5” SS pipe.
The Dodge dealer has an upgrade for the sensors, but it is only some heat rap for the existing sensors at this time.

 

Thanks for the reply. I thought there was another O2 sensor somewhere near the engine. Tell me, how difficult is it to remove the two sensors in the exhaust for cleaning? I'm mechanically inclined but a little fearful of working on my fairly new truck and screwing something up. Also, how can I tell the difference between the O2 sensors and the pressure sensors that, I assume, are located in or near the DPF. Appreciate the help....Ed

 

The o2 sensors are the bigger ones. There are 2 o2 sensors (one front, one rear) and 3 smaller pressure sensors. You simply take an open end wrench (or o2 sensor socket if you have one, but im guessing you dont), spin it out, and unplug the electrical connection on the end of the wires coming out of the sensor. Once you get down there and look at it you will realize it is nothing to be afraid of.

 

The two pressure sensors (metal lines) are 5/8 wrench.
The three EGT probes (electric wires) are 9/16 wrench.
The two larger sensors are the O2 sensors.
I know all of this is metric, but I just walked over to the exhaust I removed, with standard wrenches, to get an idea of what size they are. The 9/16, and 5/8 will fit, and I think the O2 is about a ¾, which will be a 19mm, maybe a little bigger.

 

Thanks, guys. Your assistance is appreciated.