Most OBD2 vehicles have two O2 sensors, and will still often run fine with one working and one failing. It will possibly be out of emissions spec though, and may not run optimally for air/fuel, etc., which is why there is a CEL. It's best to replace it for performance and fuel economy.

 

I'm not sure why it would be flashing. It should just stay on as a solid check engine light and only blink if you are checking the code. Do what they said and check the code yourself or get a scanner run on the obdII port which will tell you a little more specific info.

 

Yea the O2 sensor can fuck up your fuel ECO. My integra is missing the rear one and its running RICH so im getting 200-215 gallons to a tank with soft driving

 

Refer to Nic's post above. He is right on the money with this. Anytime ANY check engine light flashes it means fuel is basically being dumped into the cat and if run long enough it will eventually start to glow red/orange and by that point your pretty much fucked.

 

haha damn i've never seen that on any hondas, but then again very few i mess with actually have cats.

 

Ummm smart guy, the codes are the same in OBDI and OBDII. I think instead of being a smart ass to someone that's been around honda pgmfi longer then you've probably been alive, YOU should be doing the searching. When you are done searching, come back with some accurate information, and we'll have an educated discussion about the differences in OBDI and OBDII.

That is all.

 

Why on earth would you have him do it the hard way when he can find the answer to it in 10 seconds? That's like having him jump start the car because it can start the same way, yet the key works fine.


Also to add to Nics post, I have seen mutliple misfire's causing that too. Pull out a sparkplug and dont be suprised if there are carbon tracks.

 

yep, ie., raw fuel being dumped into the cat

 

It's not a party until it glows

 

Wow, im glad you set me straight.