Whats up guys I have a couple questions......

1. I'm curious if the prelude sh might have an extended warranty from the factory like the civics that got?


2. 01 Prelude SH H22 speed bone stock.....
just had a code for the front O2 sensor circuit having high voltage.... so we installed a denso OE replacement..... the code went away..... three days later it popped a code for catalyst effencey below threshhold.... Is this likely that the rear 02 sensor is going bad causing the code or would it more likely be the catalytic converter?

 

9 times out of 10, it means bad cat. The other time out of 10 means bad rear O2.

 

Test your cat. Once the car is at operational temperature, take an infrared thermometer and measure the temperature directly before and after the cat, while holding the car at 2500 RPM's. It should be hotter coming out of the cat by at least 50 degrees. Usually if you have a bad o2 sensor it will mask another code for something else, including the cat. I would also erase the code and drive it on the freeway for about 5 min, then get off, turn off the car, wait 1 min, and get back on the freeway for another 5. If the code comes back you have a bad cat.