tweakingmsp
Member
- :
- 2003.5 MazdaSPEED Protege
As the title says, CEL P0140. I know that its O2 sensor ckt no activity (bank 1 sensor 2), but thats all the more I know. Can someone please explain what CKT and bank 1 sensor 2 is?
It is the last one in the exhaust chain. 1st one is in your exhaust manifold and that is the one that is the most important.
Check your connection and take it out and clean it, it may just be carbon fouled and not really dead.