Is there fusies goijg to you o2 sensor if so could that make my 2002 chev truck lack power got alot of codes po157 po101 po161 po 135 and po300 any help

Well, code 141 is for a problem with the heater circuit for O2 sensor bank one sensor two which is after the catalytic converter.
Code 157 is for the same issue but with bank two sensor two, and 155 is for bank two sensor one. I would look at the wiring for those O2 sensors first. It is very rare for more than one O2 sensor to fail at any given time.
Code 300 is for a random miss which may be tough to track down.

there is a code table here: code table
hope it can help u and good luck

The PO161 code tells you

Did you not google it, to learn what the
reason for the code was

Doesn't mean a sensor is bad,maybe,but you have
to do some testing

PO 161--Bank #2 Sensor #2

Bank #2 is the side opposite cylinder #1
& Sensor #2 is the one at the converter outlet

Need to study OBD2 Systems before you go
any further

CODE PO161 IS REGARDING OXYGEN SENSOR BANK2 SENSOR2 WHICH IT IS LOCATED IN THE BOTTOM RIGHT SIDE OF THE CAT ON THE OUTPUT OF THE CAT.REGARDING CODE P1135 IS FOR AIR FUEL RATIO OXYGEN SENSOR MALFUNCTION BANK1 SENSOR 1. MY OPINION CHANGE THE SENSOR BANK 2 AND RESET THE FAULT USING A SCANNER AND DRIVE IT. I BELIEVE WILL SOLVE THE PROBLEM.

o2 sensor circuit malfunction bank 2 sensor 2

I have circled the sensor in the picture. It is the bank 2 downstream O2 sensor.

new spark plugs basic tune up this will fix it ,then fine the small vacuum leak fix it this should take care of it.

Hi, the P0141 is the O2 sensor, more info @ http://www.obd-codes.com/p0141 . Also P0506 code is Idle Air Controller problem - http://www.obd-codes.com/p0506

check your O2 sensor and wires other thinks that can cause that problem is when the engine is running in close loop. u should check if the other codes have to do anything with the coolant system. u should fix the other codes first and see if the p0157 go away.

Front heated O2 sensor no inversion. It means that the signal isn't increasing like it should. Most likely the O2 sensor is bad. It could also be a short or that the wires aren't plugged in all the way. Another possibility is that the PCM isn't getting vacuum signal.