Oxygen Sensors; codes P0138 & P0140
Oxygen Sensors; codes P0138 & P0140
I have changed these two sensors more than once. I'll clear the codes, then after a few weeks I'll get the codes again. I have put in AC Delco & another brand. There wasn't a difference. I got the same codes. Any ideas? Thanks.
Re: Oxygen Sensors; codes P0138 & P0140
You could have other symptoms that are setting the oxygen sensor codes, when it really isn't a sensor problem at all. A lean condition, or a rich condition can set the codes. A clogged catalytic converter can set the codes as well. There could also possibly be a wiring problem or even a faulty computer. If sensor replacement doesn't fix the issue, you have to start looking elsewhere for the problem.
GM Dealer Technician For 18+ Years
In the automotive industry for 20+
In the automotive industry for 20+
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