GTP O2 Sensor - Pontiac G6 Forum
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post #1 of 2 (permalink) Old 07-01-2015, 12:06 PM Thread Starter
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GTP O2 Sensor

Does anyone have experience or detailed instructions on replacing the bank 1 upstream O2 sensor on the 3.9?

drlawsoniii is offline  
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post #2 of 2 (permalink) Old 07-03-2015, 07:03 AM
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Join Date: Jul 2015
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Engine Light and O2 sensors

I thought it too was OS2 sensors if the engine light comes on regularly,
found my problem to be Clean the Master Air Flow with cleaner, MAF is easily removed from the air intake after the air filter housing, did this and my issues cleared completely.
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