hey guys, a buddy of mine has a 2000 Honda Accord SE, 2.3L i believe-it was throwing 2 codes that i pulled with my reader--P1166 and P1167, I changed out the O2 sensor but its still throwing the 1167 Code which says something about the Heater circuit for the O2 sensor, ive checked fuses an they all look okay, im not sure what to look for next, i dont know very much about honda motors so i thought i would come in an ask the experts. thanx

 

Did you reset the ECU after you replaced the O2 sensor?

If he has a stock Honda stereo make sure you know the security code before resetting the ECU. To reset the ECU you can either disconnect the (-) battery terminal or pull the backup fuse for 30 seconds. Not 100% on the 2000 Accord whether the back up fuse is under the hood or in the dash fuse box.



Modified by GhostAccord at 12:27 PM 6/5/2008

 

I cleared the codes after i replaced it, i didnt think i would need to reset the whole ecu- but now only one code comes up instead of 2 and thats P1167-basically whatever is controlling the heater element for the sensor is not working-so if i reset the ecu does it need to relearn the fuel trims an all that?

 

Yes it will have to relearn. You should always reset the ecu when you replace parts such as the O2 sensor.

Did you happen to record the Fuel trims before you replaced the O2 sensor? If you did you would be able to see the difference a new O2 sensor, and ecu reset, will make on the overall fuel trim. Reseting the ECU just helps the ECU learn faster.

If you reset the ECU and the code comes back I have a trouble shooting procedure that you can go through to check the heater circuit.

Let me know if reseting the ECU helps. If not I'll send you the test procedures for the PHO2S

 

no i couldn't see the fuel trims, i only have a code reader, not a full-blown scanner. for the heater circuit trouble shooting--are you talking about checking for resistance at the terminal? or something else? i did do a search an came across that little tidbit but have yet to try it, i haven't had access to the vehicle all day. He took it to Firestone on base an they were going to charge him over 700 bucks to change 2 o2 sensors which i was pretty sure was not gonna fix the problem. They said that it had to be a factory spec sensor or something like that, which didn't make any sense to me either, im pretty sure all o2 sensors work basically the same way. Also the rear 02 "im pretty sure" won't affect you're drivibility as it is just there to tell you that your cat is working, so it sounded like they were really trying to screw him over. What troubleshooting did you have in mind? i'd really like to see it.

 

The trouble shooting diagram I have is strait out of the Honda Shop manual. It is the resistance, continuity and voltage tests for the heater circuit. I'm guessing that you have seen this diagram... It's step by step you can't go wrong. If you give it a try it will tell you if it is the O2, a short in the wiring or the ECU. Those are the only three things that it could be.

 

nope, haven't seen the diagram-i've only seen the resistance test for the terminal where it states that it should have between 10-40 ohms of resistance for that circuit--if you could somehow give me a link to this diagram, or scan an send me a copy, or whatever, i'd greatly appreciate it-thanx.

 

Here ya go! This is the procedure for a 96-97 Accord Hope this helps.





If you need a larger file IM me your email and I can send you a PDF file.

Cheers


Modified by GhostAccord at 11:48 PM 6/9/2008

 

well heres the conclusion.. it all leads up to replacing the ecu or ecm.. I did all the test that you post up and all I need now is another gsr ecu to test it out to see if it is my jdm ecu or not.. I bought my motor from hmotorsonline so if it is the ecu then I hope steve wouldnt mind replacing it for me..

 

Just an FYI: I'm having this problem, but my 2000 Accord is a SULEV. The ULEV and SULEV, etc., models have a different O2 sensor than standard Hondas, so, you have to give Honda your VIN# to get the correct part number for the special unit (then buy it after market to save $$). Other O2 sensors won't work properly and the OBD code will return.

 

Here's the page where I read about this. I plan to change mine this weekend so I will look into resetting the ECU as well. Thanks!
http://www.hondacarforum.com/honda-2...de-1167-a.html

 

Here's an excellent thread on the O2 sensor problem:
http://www.driveaccord.net/forums/sh...ad.php?t=32835