SajMK
New Member
Hi All ,
The CEL recently triggered indicating a P0430 . Mechanic identified the problem linked to Bank 2 oxygen sensors and ended up Replacing the bank 2 upstream and downstream sensor . 2 days later , the P0420 popped up . (The P0430 is not appearing anymore ) . Any leads on whether the Bank 1 upstream and downstream sensor replacement will fix it ?
Apart from that does the PCM / ECU needs to be reprogammed after replacing the O2 sensors
The CEL recently triggered indicating a P0430 . Mechanic identified the problem linked to Bank 2 oxygen sensors and ended up Replacing the bank 2 upstream and downstream sensor . 2 days later , the P0420 popped up . (The P0430 is not appearing anymore ) . Any leads on whether the Bank 1 upstream and downstream sensor replacement will fix it ?
Apart from that does the PCM / ECU needs to be reprogammed after replacing the O2 sensors
