Found out the following issues after computer check ...
 

hello guys

i own lexus es300 1997 done 170,000 miles

ive done a computer check for the car and found out the following issues:

1- oxygen sensor heater /fault code: P0135
2- NO2 revolution sensor circuit malfunction / fault code: P1705

the oxygen seonsor issue i know about it but does any body knows what is the revolution sensor and what is it for

thanks

Here is in response to the NC2 Revolution Sensor

http://autorepair.about.com/library/a/1h/bl248h.htm

thanks for the reply
actually there is a problem with gear shifting in my car it shifts very fast may be this sensor with solve the issue