Community Forums

woodfoot · 02-09-2022, 06:42 PM

What was the original 02 sensor used on the 8.1 workhorse chassis. What brand? Is it possible to replace it with one that might not be compatible with the system, no matter what I replace it with, I keep getting low voltage 02 sensor 1. what was the stock brand when new?

153stars · 02-09-2022, 08:32 PM

Google search for low voltage O2 sensor after change GM 8.1. I'm sure you'll find some info.
A couple of my GM sensor wires the copper cracked inside insulation within 1/4" of plugs. One a speed sensor, other crank position sensor. Wife's Hyundai the AC clutch plug. Last two showed up after swapping the part but I'm sure were damaged before I touched the. I could see slightest odd bend/offset through wire insulation.

153stars · 02-09-2022, 09:10 PM

Google search for low voltage O2 sensor after change GM 8.1. I'm sure you'll find some info.
A couple of my GM sensor wires the copper cracked inside insulation within 1/4" of plugs. One a speed sensor, other crank position sensor. Wife's Hyundai the AC clutch plug. Last two showed up after swapping the part but I'm sure were damaged before I touched the. The bad wire was not the original issue except the speed sensor. All three, I could just barely make out slightest odd bend/offset/bump through or in wire insulation.

Arch Hoagland · 02-09-2022, 10:18 PM

What CEL are you getting?

Have you cleaned your MAF yet?

I was getting P0150 and P0151 codes...replaced the O2 sensors...no help.

Cleaned the MAF, problem solved and a lot more power.