OBD II codes P0161 and P0141 for O2 sensors

[scoffee]

I have a 2001 silverado 5.3. I am getting these codes on the scanner which is some kind of circuit issue. What I'm looking for is a wiring diagram showing which wires are which on the engine side the plug.

[MT-2500]

Originally Posted by scoffee

I have a 2001 silverado 5.3. I am getting these codes on the scanner which is some kind of circuit issue. What I'm looking for is a wiring diagram showing which wires are which on the engine side the plug.

A factory repair manual or a All Data Diy sub is the way to go for a wiring diagram.

There is two fuses for 02 sensors under hood fuse box.
Check both for 12 volts both side.

Pink wire at 02 sensors is heater 12 volt power wire.
black is ground.

Which 02 sensors Delphi or Denso?

[j cAT]

Originally Posted by scoffee

I have a 2001 silverado 5.3. I am getting these codes on the scanner which is some kind of circuit issue. What I'm looking for is a wiring diagram showing which wires are which on the engine side the plug.

this means that the O2 B 15amp fuse is blown !


before replacing this fuse make sure those down stream O2 sensors on each side of the engiine do not have damaged wires...I suspect they are damaged....

[scoffee]

Good deal I will try this today. It is a bousch O2 sensor. Thanks for the advice.