I have a 1998 Blazer Ls 4.3 l

i pulled the codes P0135,P0147,and P0155

Where is my h02s?

idk if im not getting power or a bad ground or if its faulty , but was woundering where this thing is on my truck ?

thanks

 

All three oxygen sensors on your vehicle are heated. All three DTC's are heater problems, first step is check the fuses.

P0135 is bank 1 sensor 1 which is located on the driver side close to the exhaust manifold.

P0147 is bank 1 sensor 3 and is located behind the catalytic converter.

P0155 is bank 2 sensor 1 and is located on the passenger side close to the exhaust manifold.