just wondering can this sensor be clean with maybe a carburetor cleaner, and reuse it again. i have 99 accord is it the same location? i dont remember seeing sensor right after the headers.

 

The Denso oxygen sensor listed on oxygensensors.com is the direct OEM replacement, which has the electrical connector already and does not require splicing the wires. The primary oxygen sensor is the upstream sensor (i.e., before the catalytic converter (cat, for short)). A downstream sensor would be on the cat or directly after the cat.

 

Here is a thread with some good points of view regarding cleaning an oxygen sensor:

ford-trucks.com/forums/6076-can-you-clean-oxygen-sensor.html

The primary sensor on your 99 Accord (Asia) appears to be on the exhaust manifold, behind the exhaust manifold cover; same as the 99 U.S. Accord. This image is from an international Honda parts site (Ling Honda) for the 99 Accord sold in Asia. I didn't confirm if it was the same F20B engine though.

 

I would like to share my experience since I got help from the others. If the Honda Accord engine light is on, go to the Auto Zone to scan the vehicle. If the scan result is Faulty A/F sensors 1, it should be faulty front oxygen sensor. Then you can rent a sensor wrench tool from the Auto Zone to remove the oxygen sensor by unclockwise it using the tool. Make sure to disconnect the battery negative before removal; otherwise, the engine light will still be on after the replacement. Then you go to the DENSO website to locate the nearest store to sell the Honda original Denso parts. It may be even cheaper than the Bosch oxygen sensor from the Auto Zone. I got it from the White Brothers Auto Parts. Good luck everyone!