Playboybunni07

Hello I Have a 1997 Honda Accord EX F22b1

I realized that my Downpipe has no o2 Sensor on it. i do believe it has one by the CAT. And my friends 1997 Accord LX has a o2 Sensor on the down pipe but mine does not.

Is that normal?
or do i have a differnt ECU? I am the 3rd Owner. and when i bought this car i have noticed that it may have modification.

i noticed it has a 1994 Accord 5spd Transmisson. and it also makes me wonder if maybe they also put a different engine in it but im not sure.


Anything can Help.

Thank you!

GhostAccord

Is this a USDM, JDM, or EDM model?

The USDM 94-95 OBD1 Accords only used only 1 O2 sensor. (HO2S)
F22B1 - Before the Catalytic Converter
F22B2 - Manifold/Down pipe

Both the USDM 96-97 OBD2 F22B1 & 2 Accords used 2 O2 sensors (PHO2S & SHO2S)
PHO2S - Manifold/Down pipe
SHO2S - Aft or the Catalytic Converter

So in short any OBD2 US/CDN Accord from 96+ should have 2 Heated Oxygen Sensors. If you are located outside of North America I'm not sure about the configurations/regulations.

Playboybunni07

Well i know i live in the USA and the Car was manufactured here and it has a F22B1 but only 1 O2 sensor... Unusual