i have a 91 si hatch and the check engine light came on...i didnt have time to check the code on it and it went off later tonight...anyways my friend said it could be the o2 scensor seeing is my car is obd nothing is this true? because ive seen people post codes on here before i just wanna make sure that this is the real problem because i dont wanna buy an o2 scensor and it not be the case....and how much do they cost?

 

help?

 

Check the code off the ecu. The check engine light just indicates that there is something wrong, the LED on the ecu will give you the specific code, and you can troubleshoot from there.

 

yes i know that but they said it has to be the o2 sensor.....they didnt check the codes they just figured that thats what it is.....anyway to explain this?

 

Backhand that person across the forehead and read one of the many codes off of the ecu that the fine Honda engineers spent all their time building into our self diagnosing cars. O2 failures are probably the most common, don't throw money at something when the solution is hidden under the carpet blinking up a storm trying to tell you something before you spend all of your money on parts that are not needed.

 

Care to explain why your friends said to replace your 02 sensor without checking what code your ECU is throwing? Is that what your asking?

If so, then they were guessing as to what may or may not be throwing the code. Bad 02 sensors will throw codes after driving for a while, but symptoms usually follow; such as loss of power after the car warms up.

But you should really pull back the passenger floor carpet and check your the code your ECU is throwing.

*Bah I'm too slow.

 

Your friend is an idiot to ASSUME thats your problem...check it out and get back to us...

 

yea but the code stoped after i got home so i cant check it...right?

 

so if my check engine light isnt on then that means there is no code..i gotta wait untill i get another light right?

 

well he said since my car is obd0 then there is nothing else wrong that the ecu can tell me...but then i member people saying yea i throw these 3 codes on my rex and ****

 

your ecu will still be blinking if you havent reset it even after the cel goes off.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91sihatchback &raquo;</TD></TR><TR><TD CLASS="quote">well he said since my car is obd0 then there is nothing else wrong that the ecu can tell me...but then i member people saying yea i throw these 3 codes on my rex and ****</TD></TR></TABLE>
There are a numerous number of codes that it can throw not 1 not 3 not 5 still more!!. Pull up your carpet count the blinks and let us know so we can help you out.

Also you wills till be able to get the code even if the CEL went off the ECU stores the code until you clear the ECU...I.E. Disconnect the battery,.....