Changed both O2 sensors for 1135 code, now gives 1130 code cel on.

Question

The first code was P1135 bank 1, sensor 2 changed rear sensor, cleared code. CEL back on, P1135 bank 1 sensor 1. Changed forward sensor, cleared code. CEL back on showing P1130. Whats wrong with this truck? Thank You

Answer 1

P1130 A/F sensor circuit range performance

Do you have a scan tool that read Fuel System. if it says Fuel System open. you would need a ECM. If the fuel System is closed, this is where the fuel pressure should be checked. and it is very important that you check the fuel pressure regulator for any fuel seepage, just by removing the vacuum hose connection as the engine is at idle if there is fuel seepage you need a fuel pressure regulator. Your next option if the fuel pressure regulator is not a problem make sure that the correct 02 sensor is being used, use another new one. If the code return you need a ECM