[timbo1]

2003 Sequoia 2WD. CEL and VSC lights on. Went to Autozone, was told Bank 2 Sensor 1 was bad. I purchased a Bosch sensor, part # 13624. Removed sensor on passenger side(under seat area...was told this is sensor location), replaced with new sensor. Old sensor does not have hex nut; new one does. Installed replacement. Lights went out, but came on again 10 minutes later, and have been on since. Went to Advance Auto, was told again Bank 2 Sensor 1 bad.

I have either (1) the wrong sensor; (2) a defective sensor; or (3) did not replace the correct (bad) sensor. Need to know: Is Bank 2 Sensor 1 the sensor under passenger seat? Any inputs or suggestions will be appreciated.

Thanks