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1999 Silverado, 4.6L base model 2 WD, 1500 - getting service engine soon light. Autozone scanner tells me O2 sensor is bad and it's Bank 1 Sensor 2. I did replace it, I drove the truck for about 30 minutes but the service engine soon light is still on. Am I correct in that this is the sensor on the drivers side, just past the catalytic converter? Do I need to drive the vehicle much longer than 30 minutes for the message to clear? I was expecting the computer to clear it by now, unless I actually have another problem. Any help would be appreciated.
 

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2015 High Country Duramax
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I found your problem. You have a ford Motor in your truck. Your truck is either a 4.3 v6 or the 4.8/5.3 v8.
 

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jcornaglia said:
.....Autozone scanner tells me O2 sensor is bad and it's Bank 1 Sensor 2....
A code with the words "O2 Sensor" in it does not mean the sensor is defective. The sensor is the messenger for something amiss in the system. Autozone can't determine if a sensor is defective from a code. But, they did make a sale!
 

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Bank 1 sensor 2 should be on the drivers side downstream of the cat.

Conditions for Clearing the MIL/DTC
• The PCM turns the MIL OFF after three consecutive ignition cycles that the diagnostic runs and does not fail.
• A last test failed (current DTC) clears when the diagnostic runs and does not fail.
• A History DTC clears after forty consecutive warm-up cycles, if this or any other emission related diagnostic does not report any failures.
• Use a scan tool in order to clear the MIL/DTC.

Take it back to the parts store where you bought the sensor and have them reset MIL or wait to complete the ignition cycles.
 
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