P0141 error code

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Dec 7, 2022 | 08:31 PM

Xlanci

Thread Starter

Starting Member

Joined: Dec 2022

Posts: 4

P0141 error code

Hey everyone I have an 03 Chevy 4.3 blazer and it has the p0141 error code I bought a new o2 sensor and it still didn’t fix it so I checked out the harness the color were white, white, black and grey on of the white ones did receive a positive charge when the key is in the on position but when I tried to probe for a negative charge nothing lit up I also don’t know which wire should be the negative so I looked up Bosch o2 sensor and it said the ground was the grey wire so I wired a quick connect to that grey wire directly to the ground and still the code persists I need to get this done for emissions so any help would be greatly appreciated I do have a snap on scanner with the live data capability but I’m still new at useing it

Dec 7, 2022 | 08:44 PM

GeorgeLG

BF Veteran

Joined: Jan 2007

Posts: 4,622

From: Florida

The wire colors on the O2 sensor itself can vary and almost never line up with the vehicle harness wire colors. First we need to get situated and then we can find out what your problem is and fix it.

P0141 is the heater circuit on B1S2 which should be the rear O2 sensor behind the cat. The vehicle harness colors should be brown, pink, ppl/wht, tan/wht. Is this what we have in your case?

After the truck warms up what does that sensor look like in a graph with live data?

George