P0131 and P0151
Hello everyone, my first post. I hope you can help me out. I have a '96 Blazer which I love. I have persistent P0131 and P0151 codes being set. It usually occurs when I really step on the pedal hard (like passing someone on the highway) I know that the P0131 is the O2 sensor circuit low voltage (bank 1 sensor 1) and the p0151 is O2 sensor circuit low voltage (bank 2 sensor 1), but I don't know what to do about it. Should I have both O2 sensors replaced or could something else be causing the problem like a bad catalytic converter? I gave it a good tune up; new cap and rotor, wires, plugs, TPS,fuel filter, air filter, cleaned my MAS etc.
Thanks for any help...