My car has a CAI but that's it. This weekend my service engine light came on and the codes 0510 and 0707 came on. Both are for the downstream oxygen sensor but I'm not understanding if it means they are bad or what should be done. Something about a maximum volt read? I reset the codes and the light hasn't returned. I have a '99 SE with about 95k on it. It's a 5sp, cali-spec engine. Any help would be appreciated. thanks!

Tom

 

Wait and see if the code comes back again. You might need an o2 sensor.