P2196 FORD - 2006 e-150

Question

light keeps coming on after o2 replaced.

Answer 1

P2196  02 sensor biased/stuck rich bank 1 senor 1

This is only reporting the condition of the engine management, It giving a rich command for a running lean engine, This can be from a fuel injector that is not injecting properly, to a vacuum leak,or from low fuel pressure.