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01-29-2005, 10:18 AM
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#1 | |
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AF Newbie
Join Date: Jan 2005
Location: MT Airy, Maryland
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99 4runner TSB Oxygen Sensor Improvement
I found out that there is a TSB for the Oxygen sensor. Does anyone know what the full story is on this. I have had check engine come on and the dealer told me I needed new Catylitic converters. I have heard that the o2 sensor can be causing this.
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01-29-2005, 05:26 PM
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#2 | |
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Resident Chemist
 
Join Date: Feb 2004
Location: Rockville, Maryland
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Re: 99 4runner TSB Oxygen Sensor Improvement
Yes, there is an HO2 sensor after the cat converter that monitors the cat converter fuction. If there is a Check Engine Light and code saying bad cat converter, then it is the HO2 sensor causing this trouble code. I would check the HO2 sensor function before you replace the cat converter.
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