'93 190e 2.3 119K. the dash indicator lamp "O2 Sensor" is ON steady, "check engine" lamp is off. with ignition on and engine running or not running, i press the reset button on the O2 control box for 3 secs (control box located on passenger side interior foot well). indicator lamp goes out for a count of 10 or so, then blinks 6 times, then a pause, then a single blink, then pause, then ON steady. this is repeatable. according to one of the shop manuals i have, the "O2 Sensor" lamp should turn on every 60K miles indicating time for service/replacement of the )2 sensor. i replaced the O2 sensor about 10K ago after the check engine lamp came on (O2 Sensor lamp off) and i read the on board blink codes at the underhood diag connector. after replacing O2 sensor, all was well until now.

anyone know what the "O2 Sensor" lamp blink codes are?