P0050 P0155 P0171 2006 Chevrolet Trail Blazer -

Question

I have three codes P0050 P0171 and P0155 I was wondering if I could have a bad catalytic converter ? The vehicle has no power, and is making popping sounds. Also it stinks. For some time, I have been getting a thump under the floor on the passenger side on start up.

Answer 1

P0050 Heater control circuit bank 2 sensor 1

P0155 H02S Heater performance bank 2 sensor 1

P0171 Fuel system lean bank 1

What needs to be found out is the poping sound, This can be from a lean misfire  from ignition coil to sparkplug wire shorting to ground, Any misfire will harm the catalytic convertor.Also where cylinder one is located at is bank 1, look for any rupture vacuum hose or vacuum lean that are causing these codes, (P0171),It also may be time to replace the sparkplug with the sparkplug cable.