My car set a front 02 sensor error code again. The last one (and first one with me) was at 80,404 miles. Today's mileage is 81,030. There were no other codes, just like last time.

If this were being caused by vacumn leaks I suspect there would be other codes or driveability problems. There aren't. I'll see how long this takes to happen again then probably pull the sensor out and try cleaning it as per the Ozbrick website posts. I know, I can just replace it with a Bosch universal # 15097, which is available at Autozone and other shops but I like messing around with this stuff. BTW, the Autozone price is $150.00.

Another lister suggested fuel quality could be triggering the errors. I'll try changing my brand which right now, ahem, Sam's Club's finest 92 octane. I'll try Texaco for awhile and see what happens.
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Erwin in Memphis, '95855t, '86 Guzzi LeMans, '76 Montesa 348 Cota