Ok this is driving me Nuts; I found a vacuum leak and fixed that during
that time I was getting MAP sensor errors but now I am getting all
of these codes and I’m not sure if I should replace the B1S3 sensor.
I was hoping to get some help from you all!

Thanks in advance!


View / Vehicle Trouble Log / Summary
Time Vehicle Trouble Code Description

Problem 1 2/10/2007 8:31 PM chevy Blazer P0174 System Too Lean (Bank 2)
Problem 17 2/14/2007 9:09 AM chevy Blazer P0144 O2 Sensor Circuit High Voltage (Bank 1, Sensor 3)
Problem 19 2/14/2007 10:46 AM chevy Blazer P0174 System Too Lean (Bank 2)
Problem 20 2/14/2007 7:54 PM chevy Blazer P0144 O2 Sensor Circuit High Voltage (Bank 1, Sensor 3)
Problem 21 2/14/2007 7:54 PM chevy Blazer P0174 System Too Lean (Bank 2)
Problem 22 2/14/2007 7:58 PM chevy Blazer P0147 O2 Sensor Heater Circuit (Bank 1, Sensor 3)
Problem 23 2/14/2007 8:46 PM chevy Blazer P0144 O2 Sensor Circuit High Voltage (Bank 1, Sensor 3)
Problem 24 2/14/2007 8:46 PM chevy Blazer P0147 O2 Sensor Heater Circuit (Bank 1, Sensor 3)
Problem 25 2/14/2007 8:46 PM chevy Blazer P0174 System Too Lean (Bank 2)
Sensor 3)
Problem 30 2/15/2007 8:59 AM chevy Blazer P0147 O2 Sensor Heater Circuit (Bank 1, Sensor 3)
Problem 135 2/23/2007 9:58 PM chevy Blazer P0171 System Too Lean (Bank 1)
Problem 136 3/10/2007 10:42 AM chevy Blazer P0144 O2 Sensor Circuit High Voltage (Bank 1, Sensor 3)
Problem 137 3/10/2007 10:47 AM chevy Blazer P0144 O2 Sensor Circuit High Voltage (Bank 1, Sensor 3)
Problem 138 3/10/2007 11:10 AM chevy Blazer P0144 O2 Sensor Circuit High Voltage (Bank 1, Sensor 3)
Problem 139 3/10/2007 12:19 PM chevy Blazer P0144 O2 Sensor Circuit High Voltage (Bank 1, Sensor 3)

 

Wow... You could condense that down to the 3 or so main codes you've gotten...

B1S3 is only an emissions monitoring sensor. Nothing to do with fuel delivery.

We need to know a bit more about your truck though... Basic information would be the year. I can assume '96+ due to OBD2 codes, but the '96-'97 trucks had 4 O2 sensors while the '98+ have 3.

 

97, v6, 4x4 106k on the mileage,

New intake gaskets 8 months ago, along with new plugs new water pump, new fuel pump, filters,
basicly everything reworked.
this problem just started