[Darkday]

<div class='quotetop'>QUOTE (youpaiyou @ Apr 14 2009, 09:14 AM) <{POST_SNAPBACK}></div>

That makes sense. An 02 conditoner for each 02 sensor since I don't have a cat.[/b]

You don't want to do that because the precat sensors are for fuel trims.

 

[youpaiyou]

Ok, thanks guys. This information is helpful. I double checked the wiring to the driver's side 02 sensor and conditioner (I also spliced the wires behind the tail light) and it's fine. Thus, the P0420 code must be coming from the passenger side 02 sensor.

 

[Darkday]

<div class='quotetop'>QUOTE (youpaiyou @ Apr 14 2009, 10:42 AM) <{POST_SNAPBACK}></div>

Ok, thanks guys. This information is helpful. I double checked the wiring to the driver's side 02 sensor and conditioner (I also spliced the wires behind the tail light) and it's fine. Thus, the P0420 code must be coming from the passenger side 02 sensor.[/b]

No it has to be coming from the post cat sensor because it's after the cat. Remember the 'precat' sensors are just seeing raw exhaust gasses which is why they can control the fuel trim. They have no idea if there's a cat there or not.

 

[vvt-mr2]

When you keep saying drivers side o2 conditioner, what do you mean? Are you talking about the resistor PPE supplies for the 2 to 1 o2 conversion? or do you have more than 1 conditioner?? Did you read the instructions supplied with the PPE setup?

 

[youpaiyou]

<div class='quotetop'>QUOTE (vvt-mr2 @ Apr 14 2009, 09:44 AM) <{POST_SNAPBACK}></div>

No, You only need one conditioner. but it has to be on the sensor on your downpipe. The upflow sensor, I believe it's called.[/b]

I have the 02 conditioner on the 02 sensor that plugs into the down pipe. However, I am still getting the P0420 code. I'm checking my wiring harness again to make sure that it conforms with PPE's instructions.

 

[WTS]

Where is the the 3rd o2 sensor in your setup?

If its hanging in space then thats why the P0420 is popping up.

With the PPE harness you dont do any splicing of the post main cat O2 wires.

 

[youpaiyou]

<div class='quotetop'>QUOTE (WTS @ Apr 14 2009, 11:24 PM) <{POST_SNAPBACK}></div>

Where is the the 3rd o2 sensor in your setup?

If its hanging in space then thats why the P0420 is popping up.

With the PPE harness you dont do any splicing of the post main cat O2 wires.[/b]

I only have two 02 sensors. I have one 02 sensor with the 02 conditioner plugged into the downpipe. I have another 02 sensor plugged into the header. This 02 sensor is spliced with PPE's wiring harness. One side of it is connected to its plastic plug and the other side is connected to the external resister. I don't have a 3rd 02 sensor plugged in anywhere. Instead, I have the 3rd 02 sensor plastic plug connected to the other side of the external resister.


http://www.ppeengineering.com/assets/documents/mr2header.pdf

It looks like my "external resister" is fried. Would that cause the P0420?

 

[natecydoubleg]

<div class='quotetop'>QUOTE (youpaiyou @ Apr 15 2009, 12:17 AM) <{POST_SNAPBACK}></div>

<div class='quotetop'>QUOTE (WTS @ Apr 14 2009, 11:24 PM) <{POST_SNAPBACK}>

Where is the the 3rd o2 sensor in your setup?

If its hanging in space then thats why the P0420 is popping up.

With the PPE harness you dont do any splicing of the post main cat O2 wires.[/b]

I only have two 02 sensors. I have one 02 sensor with the 02 conditioner plugged into the downpipe. I have another 02 sensor plugged into the header. This 02 sensor is spliced with PPE's wiring harness. One side of it is connected to its plastic plug and the other side is connected to the external resister. I don't have a 3rd 02 sensor plugged in anywhere. Instead, I have the 3rd 02 sensor plastic plug connected to the other side of the external resister.


http://www.ppeengineering.com/assets/documents/mr2header.pdf

It looks like my "external resister" is fried. Would that cause the P0420?
[/b][/quote]

P0420 only associated with your O2 sensor that's after your catalytic converter. mostly it's due to short or ground wiring
i am having this problem but only in the rain because i didn't seal the bypass wires and resisters with electric tape and they are grounded when water gets in
and now the light is gone by itself because the wires are now dry, double check what you wired and just maybe your wires are loose or they are touching
don't bother with the black ones since they are heater circuit, your main concern is the white and blue ones

 

[youpaiyou]

That makes a lot of since because you have to strip the blue and white wire when you install the 02 conditioner. I stripped more of the blue and white wire than I needed so the exposed wire can be seen coming out of the 02 conditioner. I bet that my exposed white and blue wires are coming in contact with each other.

 

[natecydoubleg]

<div class='quotetop'>QUOTE (youpaiyou @ Apr 15 2009, 12:28 PM) <{POST_SNAPBACK}></div>

That makes a lot of since because you have to strip the blue and white wire when you install the 02 conditioner. I stripped more of the blue and white wire than I needed so the exposed wire can be seen coming out of the 02 conditioner. I bet that my exposed white and blue wires are coming in contact with each other.[/b]

then go fix it! and tell me if it works
i have this problem for the longest time and im glad my solution help a little? lol

 

[WTS]

<div class='quotetop'>QUOTE (youpaiyou @ Apr 14 2009, 10:17 PM) <{POST_SNAPBACK}></div>

<div class='quotetop'>QUOTE (WTS @ Apr 14 2009, 11:24 PM) <{POST_SNAPBACK}>

Where is the the 3rd o2 sensor in your setup?
With the PPE harness you dont do any splicing of the post main cat O2 wires.[/b]

I only have two 02 sensors. It looks like my "external resister" is fried. Would that cause the P0420?
[/b][/quote]I know you only have two and Im saying the PPE harness doesnt apply to the 2nd one (3rd in stock config) after the cat.
If you've cut/spliced/hacked/touched the o2 sensor thats after the cat as part of the PPE install THEN YOU'VE DONE IT WRONG.

The post cat o2 is the only sensor that causes a PO420 and its not a part of the PPE install. You should have just left it alone after screwing it into the HF cat.

 

[youpaiyou]

<div class='quotetop'>QUOTE (WTS @ Apr 15 2009, 04:49 PM) <{POST_SNAPBACK}></div>

<div class='quotetop'>QUOTE (youpaiyou @ Apr 14 2009, 10:17 PM) <{POST_SNAPBACK}>

<div class='quotetop'>QUOTE (WTS @ Apr 14 2009, 11:24 PM) <{POST_SNAPBACK}>

Where is the the 3rd o2 sensor in your setup?
With the PPE harness you dont do any splicing of the post main cat O2 wires.[/b]

I only have two 02 sensors. It looks like my "external resister" is fried. Would that cause the P0420?
[/b][/quote]I know you only have two and Im saying the PPE harness doesnt apply to the 2nd one (3rd in stock config) after the cat.
If you've cut/spliced/hacked/touched the o2 sensor thats after the cat as part of the PPE install THEN YOU'VE DONE IT WRONG.

The post cat o2 is the only sensor that causes a PO420 and its not a part of the PPE install. You should have just left it alone after screwing it into the HF cat.
[/b][/quote]

I installed the post cat 02 without modifying it but I still threw the P0420 code. That's what got me thinking about the 02 conditioner and the anti-foulers.

I don't have a HF cat. I have no cat. I'm running a down pipe. That is why I had to connect an 02 conditioner to the "post cat 02." Paul from PPE told me to install the 02 conditioner on the 02 sensor that plugs into the down pipe. Paul also told me that a fried resister would not cause a P0420 code. He said that if my resister was cooked that I would be getting a different code.

 

[youpaiyou]

<div class='quotetop'>QUOTE (natecydoubleg @ Apr 15 2009, 12:30 PM) <{POST_SNAPBACK}></div>

<div class='quotetop'>QUOTE (youpaiyou @ Apr 15 2009, 12:28 PM) <{POST_SNAPBACK}>

That makes a lot of since because you have to strip the blue and white wire when you install the 02 conditioner. I stripped more of the blue and white wire than I needed so the exposed wire can be seen coming out of the 02 conditioner. I bet that my exposed white and blue wires are coming in contact with each other.[/b]

then go fix it! and tell me if it works
i have this problem for the longest time and im glad my solution help a little? lol
[/b][/quote]

That didn't fix the problem. I have no idea why I'm still getting the P0420 code now. It's a long shot, but maybe the brand new 02 conditioner is faulty. I guess I can install the anti-foulers and see if that solves the problem. If so, then the 02 conditioner is bad.

 

[youpaiyou]

Ok, drum roll please ........... The problem is that I am a complete dumb ass!


The 02 conditioner instructions CLEARLY say that the blue wire needs to be connected to the 02 conditioner slot labeled "S." I had the blue wire connected to the slot NOT labeled "S." I'm going to correct this error tonight and drive it to and from work tomorrow (60 miles each way). If the CEL doesn't come on by the time I get home I have fixed the problem.

 

[vvt-mr2]

did you fix this thing yet? You know I've heard of other people with the same problems with the PPE setup, but if you have the conditioner on the downpipe sensor and have the PPE wiring harness hooked up correctly you shouldn't get a code. I don't anyways.

 

[youpaiyou]

It hasn't come on yet. I'll declare victory if it doesn't come on by Monday night. Thanks for your help guys.

 

[Galo]

ypy, :eusa_doh: :eusa_wall: , what are we gonna' do with you :icon_lol: Been there, done that(TOO many times) :icon_redface:

I hope all is well now :biggthumpup:

 

[HgSpyder]

I am having the same problem with the TTE high flow cat. now my car is due for inspection. I reset the ecu to get rid of the cel, but then the Va insp computer sees that there is not enough miles of data for a valid test.

So, I just tried the non-fouler fix. it takes about 100 miles or so before the ecu will show enough data for the inspection and I think that's why it takes a while for the cel to come back on after each reset. it doesn't fail until it turns on the reporting for that module (cat). So, I will be out driving for a while to see if it's really fixed.

 

[youpaiyou]

<div class='quotetop'>QUOTE (HgSpyder @ May 9 2009, 02:30 PM) <{POST_SNAPBACK}></div>

I am having the same problem with the TTE high flow cat. now my car is due for inspection. I reset the ecu to get rid of the cel, but then the Va insp computer sees that there is not enough miles of data for a valid test.

So, I just tried the non-fouler fix. it takes about 100 miles or so before the ecu will show enough data for the inspection and I think that's why it takes a while for the cel to come back on after each reset. it doesn't fail until it turns on the reporting for that module (cat). So, I will be out driving for a while to see if it's really fixed.[/b]

You may not pass the visual inspection if you use the anti-foulers. I would buy an 02 conditioner from PPE. They cost $15 shipped. If you are lucky, Paul at PPE will give you one for free.

Alternatively, you can make your own 02 conditioner. While doing research on this subject I learned that you can buy all of the pieces at RadioShack for $2.

 

[WTS]

<div class='quotetop'>QUOTE (HgSpyder @ May 9 2009, 12:30 PM) <{POST_SNAPBACK}></div>

It takes about 100 miles or so before the ecu will show enough data for the inspection[/b]

The PO420 can be auto-reset or triggered again in roughly 40 minutes of driving separated by two engine starts.

1. Get ECT to 176+
2. Drive for at least 15minutes.
3. Hit 45mph at least once.
4. Shutdown and repeat once.

Do not disconnect the battery or turnoff the CEL with a scantool. It sets all the ready-to-test flags to "NOT READY".