O2 sensor 2007 G6 GT - Pontiac G6 Forum
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post #1 of 2 (permalink) Old 07-08-2018, 11:24 PM Thread Starter
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O2 sensor 2007 G6 GT

I have a 2007 G6 GT and my problems all started with the left front catalytic converter. Dealers said an after market won’t work because it won’t give the correct emissions reading. I live in Pa. But a new one is $650 and up. So I went with after market. Now check engine light is on. Front O2 sensor. Found out it was unplugged. So I plugged it in. Now service traction message pops up. Transmission shifts like a sledge hammer is being used. So I unplugged the O2 sensor. Everything back to normal. Except check engine light. So I replaced the O2 sensor. Plugged it in and all. Check engine light still on. Something about lean fuel #2. Service traction message pops back on. Transmission slams into gear again. So I unplugged the NEW O2 sensor. And everything back to normal. Except check engine light. ANYONE.....have ANY clue??? It’s a 3.5 ltr. Only 88,500 miles. I love this car and don’t wanna have to blow it up!!!!
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post #2 of 2 (permalink) Old 07-15-2018, 08:54 AM
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Location: Colorado Springs, CO
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Let's go back a step.
What was the actual code, and which sensor did you physically change?
That an aftermarket sensor won't work is rubbish, best bet there is to get a sensor made by an OEM manufacturer like Denso, Bosch, AC-Delco or something like that. Cheap is bad, and can work, but in sensors you can get what you pay for.

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Last edited by davez26; 07-15-2018 at 10:11 AM.
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