The CEL on my car tells about faulty oxygen sensor using the OBD1 code reader, but didn't say which sensor is at fault. So my question is how many O2 sensor does my car have and their location? What's the difficulty level o doing this job? Please advise. Thank you.

 

OBDII scanner should tell which one.

 

Thank you for your response, Fathertime. My car has the 38 socket connector that uses the OBD1 reader. I'm not sure if I can use the OBD 2 reader on my car. I was told there are 2 oxygen sensors in my car and I don't know which one to replace.

 

My 94 SL320 has OBDII plug is at the bottom of dash at your right knee.

 

Good day Mr. Fathertime,
I did look under the dashboard on both driver and passenger sides and I didn't see OBD2 port on my car. I did try to clear the code, but CEL still on. However, I haven't driven it yet since clearing the code. Would it matter?