Quote:
Originally Posted by autojoe
wrong 02.....wrong bank.....this code does not relate to the fuel control 02 which is the pre cat 02 sensor......it relates to the post cat 02 sensor heater bank 2 sensor 2 which is the bank opposite cylinder 1 and post cat 02 heater.bank 2 sensor 2.did not heat the sensor during startup.check for battery voltage at 02 heater (br-pk) wire if good check (bk) heater ground wire.if both power and ground are good then replace sensor.what size engine?
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swaping O2 sensors is a sure way to test the O2 AS THE PROBLEM.
with intermittent issue like this you need to do this type of troubleshooting.
he never said anything about fuel management .
this code still should be fixed even though, it is only performing cat converter monitoring performance.
this code will throw if the O2 voltage does not swing properly..could be heater feed connections or the pcm connections, wire damage, connectors...