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Code P0141 - O2 Sensoor Heater Circuit

wmwtn

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wmwtn Enthusiast

wmwtn

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I just had the exhaust replaced from the manifolds back throuth both converters on my '98 5.7L. The cats were replaced to fix a P0430 code. The tech did the worst job I've ever seen in my life. When I got it back the cats were vibrating against each other and one O2 sensor was forced solid against the heat shield. When the truck would accelerate and decelerate we could hear the "creek" that we later found out was the body against the O2 sensor.

 

I knew I was in trouble. I got the shop to fix the exhaust where it didn't touch and they assured me all was okay (like I was gonna belive that). I drove it for about 150 miles and this evening I got the code P0141 - "O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)".

 

Which O2 sensor is this referring to? In front or behind the cat? Left or right side?

 

I had already replaced the two front O2 sensors with new Boche units the week before I took it in for the cat replacement. I don't see why they would have touched the rear O2 sensors behind the cats, but maybe they could have. So my fears are broken/cracked sensor or burned wires, or ???? Ugh...

 

I'll get under it tomorrow and see what I can. All tips and info really appreciated!

 

Thanks to all,

Marty

wmwtn Enthusiast

wmwtn

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Posted

Thanks chevroletmb! I'll crawl under it tomorrow. The rear O2 sensors are still original at 129K miles, so I expected to replace them fairly soon anyway, but just not immediately... Many thanks...

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