How do you repair DTC codes P1131 P0301 P100?

Answer 1

P1131 is O2 sensor bank one slow to respond (paraphrased). It means that something is making the O2 sensor on that bank switch at a slow rate. Possibilties could be that the sensor is bad, you have a vacuum leak, or that there is a misfire on that bank, which coincidentally is waht the P0301 means that you have a misfire on cylinder #1 which is on bank one. So fix the misfire on cyl #1, and you just might fix your P1131 in the process. There is no such thing as a P100, so I suspect you meant a P1000, which means simply that either that battery has been disconnected or the PCM code memory has been erased, or for whatever reason, the PCM had it's fail codes lost from memory. That code won't set a check engine light(CEL), so dont worry about that code. I think we need to fix the misfire, erase the PCM and test drive to see if the CEL comes back on. To fix the misfire, start looking at stuff like spark plugs, coil, plug wires(if it has plug wires).