Greetings,
I'm getting a few DTC codes right now, and while a few of them are in the '03 shop manual that I have a copy of, a few of them aren't. I have an '04.5 and I suspect that these codes may be specific to this version of the ECU. I was wondering if someone with an 04 or 04.5 manual could list these codes for me.

The car feels like it is running just fine, no hesitation, etc, though I've really stayed out of the boost until A) I can check these codes, and B) I can get the car back to the shop to address my high boost issue.

so here's the codes that are currently tripped:

P0300: Multi-cylinder misfire. There are other Tnetic owners who have had this code. I'm going to be getting a CJ-motorsports shielded CAS wire installed. Hope this will help since part of the logic for this code monitors the CKP sensor every 1K revolutions.

P0430: Catalyst System Efficiency below threshhold. I suspect I have one of the original pipes that does not include the 'non-foulers' for the O2 sensors. I'll have this checked by the shop.

P0455: Gross EVAP Leak. This has been tripping in hot weather ever since I got my GReddy EVO2 installed. I think it has to do with the replacement rubber tubing for the EVAP canister at the back of the car. I keep clearin' it, it comes back every week or two. The hotter it is outside, the more frequently it trips. Not an issue for me, I'm a pro at resetting the ECU.

P1273: This isn't listed in the '03 Service manual....Need some help on this one

P1284: Again, not listed in the '03 Service Manual. Hook me up!

Again, the car starts fast, runs great, and the little that I've boosted with it (I can only get to about 75% throttle before I hit my 8 lb boost warning).

The car goes into the shop on Wednesday to address some issues, but I'm almost not comfortable driving it with undiagnosed codes in the MIL.

Thanks for any help you can offer.

 

P0300: Multi-cylinder misfire.

This is usually happening when the o2 sensors pick up a very rich condition in relation to what the MAF is saying is going into the motor for air volume.

P0430: Catalyst System Efficiency below threshhold. I suspect I have one of the original pipes that does not include the 'non-foulers' for the O2 sensors. I'll have this checked by the shop.

Again this is in relation to the rich condition monitored between the front and rear o2 sensors. If the rear o2 sensor sees a rich condition the ecu thinks the cats are cooked ti it throws the code.

P0455: Gross EVAP Leak. This has been tripping in hot weather ever since I got my GReddy EVO2 installed. I think it has to do with the replacement rubber tubing for the EVAP canister at the back of the car. I keep clearin' it, it comes back every week or two. The hotter it is outside, the more frequently it trips. Not an issue for me, I'm a pro at resetting the ECU.

This is an 04 addition to the emissions system I think....that's why it is not in the manual. I have an 2003 1/2 and I don't hav any of that crap to hook into my Evo2 exhaust.

P1273: This isn't listed in the '03 Service manual....Need some help on this one

P1284: Again, not listed in the '03 Service Manual. Hook me up!

Again, I am sure these are both 04 additions to the emmissions control system.

 

Thanks g356gear. I really just need help with the last two. The others I am comfortable with (though I am going to have the car re-dynoed with A/F just to verify that I'm still ok on A/F)

 

Here's a reply from another forum that may help a little.


"The codes read p1283 and 1273 (manufactured controlled air and fuel metering). My installer gives the same explanation as yours (you didn't install my APS, right?
I talked to APS and they said they have not seen this in any of the cars installed so far."



It would appear that all your codes relate to too rich a A/F ratio

 

Hmmm...that's interesting. My A/F is on target at 11.5 - 12.0 until about 4500 RPM where it starts a linear decline to 10.5 at 5500 RPM. After that, it climbs back to 11.0 up to redline.

Well, I guess we'll see what the shop can find out on Wednesday. In the meantime, I'm guessing that the car is safe to drive, would you agree?

 

I would not see a problem unless it was going into limp mode. The 04's may just be more sensitive because they have the wideband o2 sensors unlike the 03's.

 

Do they? I thought the WB O2 was new for '05, not '04.

 

widebands are from production Nov03 and beyond. Your car would be safe to drive, given the codes you just outlined. Honestly, all of the codes are "typical" of F/I applications, and nothing to worry about.

I little bit of fine tuning will probably eliminate most of them. The emmissions codes are the most stubborn.

 

Thanks Sharif! My car's build date was 11/03, so that's good information to have. Does this mean that I could buy an A/F gauge and just use this sensor?

Anyway, I'm glad to hear that the car is safe to drive.

Any recommendations on "fine tuning", given that all I have is a re-flash? I know there is a new pipe with pre-fitted non-foulers out now, and I think Turbonetics will send those to people that don't have them. I'm also having the CJ-Motorsports shielded CAS wire installed. Beyond that, any suggestions on what can I do?

I guess I need to invest in a scan-tool. I'm one of those people that really doesn't want to drive around with my SES light on.

Again, thanks for the info.

 

Those codes are for your two rear O2 sensors. They are the same codes my car threw during testing as a result of not having those non-foulers. The new downpipe stopped that code from coming on in mine.

 

IIRC, Turbonetics can reflash your ECU at no cost, if it needs some adjustment. Mia can confirm if that is, in fact, the case.

For further fine tuning, I would put an eManage Ultimate on the car, and then AAM can fine tune with timing and fuel, among a whole bunch of other features.

Since you have a wideband factory gauge, in theory, you should be able to hook up a gauge and display your A/F ratio. However, you would need to dig up the scaling voltage values, since O2 sensors vary in regards to scaling. Some are linear, and some are not.....etc..etc. In other words...what does the factory 0-5V mean in terms of A/F ratio?? That is the big question.

Honestly, the easiest thing to do is get a stand alone A/F guage.

 

Turbonetics can correct flash issues for you if need be although a more viable option might be to talk to AAM since they are right there and they can dyno tune your flash for any other mods you have.

 

In speaking with Mike during my visit to AAM, they mentioned they cannot read and make changes to the Turbonetics program. They would have to erase it, and then start from scratch.

 

Hmm interesting I thought they said they could...in that case then yes absolutely go with an Emanage if you want to fine tune the hack out of it...

 

Kelly, you might wanna double check with AAM on their opinion with this. Mike, Dave, and I talked about 3756 things that day....

 

Finally found one of the codes

P1273 = Air/Fuel Ratio Sensor 1

 

I definitely will. The car goes back in for some adjustments, the high boost issue, installation of the CJ-Motorsports shielded CAS wire, and re-dynoing. We'll go over options from there. If the ECU needs to hit the west coast again, that's fine. Thanks!

 

May I ask where you found this, just for my own education? I searched for "1273" through the whole '03 shop manual and this string is nowhere to be found.

 

I have the print out at work . I will post tommorrow am.

 

P1284=Air Fuel Ratio Sensor 2