Hey everyone, first time here so bear with me, I've been looking everywhere for an answer can't seem to find the slightest help, I'm attempting to replace a bad O2 sensor. Received a CEL with a code of p0135, which after research pertains to bank 1 sensor 1 (I live in California so I have 4 sensors), the one I need to replace is the driver side upstream sensor. Now my problem is I have no idea how to access the sensor! It is in such a hard to reach spot removing the sensor is going to be a struggle but the worst part is disconnecting the socket. It's so hard to reach and I am unsure how the get to it. My guess is removing the manifold to get to it from the top instead of under the car. Anybody ever run into this problem? Any help would be greatly appreciated. By the way it is for a 2000 ram 1500 v8 magnum 5.9L. There is difference between the 5.2 and 5.9 and every forum I find pertains to the 5.2 which only has 3 sensors, I believe.