98 Bonnie 3.8 V-6 Bank 1 Sensor 1 Location - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 07-18-2005, 11:07 AM   #1
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Default 98 Bonnie 3.8 V-6 Bank 1 Sensor 1 Location

I am replacing the H02 Sensor for Bank 1 Sensor 1. Does anyone know the exact location? Is it the front (closest to the radiator) or rear sensor? Any help is appreciated.
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Old 07-18-2005, 11:10 AM   #2
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I believe that is the sensor in the exhaust manifold, just before the firewall.

A gearhead will read this and should be able to confirm.
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Old 07-18-2005, 11:30 AM   #3
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I believe there are 2 H02 Sensors on this engine. One near the radiator (front) and one on the exhaust manifold near the firewall. I am not sure which is Sensor 1 Bank 1.
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Old 07-18-2005, 10:08 PM   #4
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Bank one sensor one is in your REAR exhaust manifold. It'* the only one that matters. The one behind your catalytic converter just sniffs the exhaust to see if the Cat is doing it'* job. Look down the back side of the engine near the firewall and you'll see a spark-plug looking thing sticking out of the rear exhaust manifold right before the downpipe union. That'* it.
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Old 07-19-2005, 10:47 AM   #5
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Thanks willwren.
Thats what I needed.
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