Mechanics

CHEVY O2 SENSOR

2000 Chevrolet Malibu

Computer problem
2000 Chevy Malibu 6 cyl Front Wheel Drive Automatic 78000. Miles

I had code po141 checked fuses changed bank # 2 sensor. Drove car for 2 days cel back on same code po141 please help with what to do next. Thanks-Jerry-
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Theboss
December 30, 2008.




Hello
Thanks for the donation.

This code might illuminate for a faulty downstream oxygen sensor as well. Possibly on the passenger side and pre-catalytic converter. The code is just an assistant that helps pinpoint the problem, it does not always point out the exact component that needs replaced.

Hope this helps.
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Bluelightnin6
Dec 30, 2008.
You should check the supply voltages to all of the oxygen sensors with a meter to ensure they are getting correct power. If one or all of them are without power (or too much), trace wiring and test for shorts/opens in the wiring.

Possible causes of the code are below: A code P0141 may mean that one or more of the following has happened: -Open or short to ground in the wiring harness

-O2 heater circuit wiring high resistance

-O2 heater element resistance is high

-Internal short or open in the heater element

Note: Typically a failed catalytic converter does not cause this code. You're more likely to see a P0420 code for a failed converter.

Possible Solutions: -Replace oxygen sensor(s)

-Repair short or open or high resistance in wiring harness or harness connectors

Hope this helps.
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Bluelightnin6
Dec 31, 2008.
Thank you for the reply, I had to replace both sensors and the cel is staying off. I do appreciate the information you supply to many of us. Thanks again-Jerry-

Tiny
Theboss
Jan 1, 2009.

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