Hey all. 97 Mercury Sable. I've had this code for some time and have replaced plugs, wires, fule filter. All the cheap stuff so far. Now the CEL blinked for a bit yesterday so I'm moving on to the 02 sensor. There are 4. i would like to not change the wrong one. It's B2. Any ideas on the location? I know it's after the cats but not sure which one. Heres a pic of the code reader. Thanks.

 

I hate to tell you this, but changing an O2 sensor will not cure the P0430. By the time that code comes up, the converter is usually shot and can not do its job anymore. But if you want to spend the money on it, follow the exhaust from the front of the car to the one behind the converter. It might help for a few months, but it is gonna come back. Also your scan data is close to the normal range.

 

Thanks. Yeah i had a mech buddy check it out yesterday. He said it runs awesome so it's not an 02and not to throw any money into it yet. He also said that the the scan numbers look almost normal and the exhaust would smell like rotten eggs if they were bad already.