Hey,
Just came back from AUTOZONE. They are Awesome. In 20 seconds they were able to tell me why my CEL is lit. I need to get one of those Diagnostic Tool he had.

Here it is:

Code 136: O2 Sensor Bank 1 Sensor 2

Code 141: O2 Sensor Heater Circuit Malfunction

It "Sensor 2" which means it's the REAR O2 Sensor (The one after the Catalytic Converter) I thought for sure it was my Front O2 Sensor that I bought one from machv.com for $79.00 about 1 month ago. Now I have to order another one (%89.00) because nobody carries one for my 4G64 engine except the dealer and thwy want $250.00++.

Can anyone confirm these codes. I have the book at home.

I had a 50/50 shot on which O2 it could be and I guess wrong - I guess.

Later,
Mike
98 Eclipse Spyder GS

i would check to see that you dont have a bad wire on the 02 sensor, maybe you shorted/cut/burned one of the wires hence the heater circuit not working. i think your just missing a ground wire or something

yea, they did that for me a week ago for free, was kickass, got 420, catalyst efficiency prollem..... (gutted cat), I just did the O2 sensor bypass and it works fine

what exactly did you do to get rid of the CEL? Please explain the bypass for me.

You don't really need that rear o2 sensor. All it does is check that your cat is functioning properly for emissions purposes. I haven't had one for almost 2 years now, I just ignore the CEL.

I have a resonator/testpipe for a cat. I also have a CEL. It is for that and the evap. Just curious what the bypass was and how it worked.

Yeah, that's what I thought. The rear O2 is useless but now my car engine hestitates (Revs up and Down - Sometimes) when I'm at a red light. I have a Volt Gauge and it goes from 12v - 14v when this happens.

On the road it's fine. The gas mileage went down a little that's why I thought it was the front O2 Sensor.

I just don't want to replace this and have the engine still sputter at idle. (The weird thing is that it's not all the time).

I change sparkplugs (NGK) and the PCV Valve. Spark plug wires are Magnecor (Which are Awesome).

????

Any Suggestion.

Later,
Mike
98 Eclipse Spyder GS (I'll get some pictures with the top down soon)

Autozone checked mine but couldnt tell me what it ment...i got Power Train 420....gues its the cat like he said...i dont have one! lol well thats ok.





HRC stage 1



email me at Anthonyl469@aol.com if oyu have
needed: FMIC---PIPING---SpOnZeR---HOPEFULLY IRFAN WILL COME THROUGH WIT DEEZ WHEEELS.

"When you reach real ability you will be able to become one with the enemy. Entering his heart you will see that he is not your enemy after all." -Tjusii

to the peeps wondering about the bypass..you solder in a 1/4 watt, 1 megahomn resistor inline with the black signal wire on the rear o2 sensor.. i did it with my car on one jackstand..pretty easy. make sure to reset the computer aftewards