Hi All,

Thought I'd contribute my experience for those encountering the p0430(Catalytic Converter Inefficiency Low - Bank 2 error) code. Mine ended up having two bad rear O2 sensors. Along with that I had the reprogramming for the MAF done that I had replaced myself a year ago. Car runs sooo much better now.

The interesting piece is that one rear sensor was on Bank 1 which never through any code and I'm curious how long it had been bad as well as how much it impacted the performance. From what I read I don't believe this sensor had anything to do with the p0430 since the code documentation only referes to BANK2. My car was running horribly, stalling when cold, poor acceleration, burning very lean...etc.

With 113k mile I it now runs like it will last another 4 or 5 years.

Hope this helps.

 

I'm looking for a Dyno tunning shop in Southern Cali, to take my car & get the max power for my engine. I need a couple of tunning to be done in my car.

Pls adivse

 

Have you ever had P0420 code ?

 

hahaha i just got that code...good 2 no

 

 

No, I never encountered a p0420 which was strange. I'm left wondering what SES code, if any, is for a bad rear O2 sensor on Bank1.

 

The rear sensors have no impact on performance and I doubt the B1 rear O2 had anything to do with the P0430. There are various codes for the B1 rear sensor and there is a list in the Stickies if you want to know what they are.