CEL 2 months after tune
 

Had an uptune and hfcs done about 2 months ago and suddenly I'm getting a cel. When I hooked up my code reader, it told me that bank two is running lean running lean. At the same time the idle goes up to about 1k rpm ( normally set at +/- 750) . After I reset the ecu it runs fine for a while, then in stop and go traffic it pops up again. Anyone else with the same situation? I read that some of you had issuses with the berks after a month so.Could it be the o2 sensor in the hfc's or a bad sensor elsewhere ? I want an idea where to go first, the tuner or the dealership.
Thanks.

You had the car tuned by a shop?

yes I did.

The only thing I can think of is they damaged an 02 Sensor or it was not tuned correctly. But I'm thinking bad O2. Get under the car and see if the wires are messed up.

Most likely at exhaust leak. Check your HFC to be sure it's not cracked.

:iagree: Seems I here this same issue everytime I'm at a shop

Eliminate the two rear O2 sensor inputs to the ecu. The UpRev tuner should have done this. It will eliminate any rear O2 issues.

True that. That's post to be a given.

Maybe it's just a ghost in the machine. Leaving Delaware bound for central Jersey I had to reset the cel again. Drove 200 miles and no cel! I was even crawling up US 1 north in certain towns and no cel. Even let the car idle for about 10 minutes while I ran into a resturant to grab a take out meal.Could it have been a bad tank of gas cause after I filled up down there, the problem seems to have gone away?

Who you going to call?

It's baaack! Who am I going to call? The tuner. Seems like the o2 sesor is acting up, got both banks "running lean". Well since I'm getting an LSD ( a Carbonetics 1.5 ) installed on Monday, I'll have to wait untill then and just ride around with my code reader and reset as needed. Is this the same code some of you have been getting?

LSD. In for results. I haven't heard of anyone with a Carbonetics on a 370.

What kind of scanner do you have and what codes are you getting? Just because someone has the software to uprev a car doesnt mean they know how to! The rear 02's are there for a reason and no shop should cut them off completely if they know what they are doing. If they do then they are just selling you short of what a good reputable shop can give you. Think about this, if an exhaust J bend can fool a computer then why are you paying someone to tune the same thing? I would hope they would know how to tune it more efficiently.

I got a P2A00 and P2A03 after installing ART pipes. What are your CEL codes? Taking mine to Corner 3 garage Thursday.. Hopefully they can fix.

I'm using Cipher to access the codes and reset.Btw it's awesome to watch all your engine parameters and log whats' going on.
If I remember correctly I'm getting 0179, " bank one and two running lean"
The tuner is reputable and we already spoke about the problem, the rear O2 sensors will not be eliminated.
Anyway she goes in on Monday for both the cel problem and the lsd.
I'll keep you all updated on the rearend.

I also got an SES light 480 miles after installing ART pipes and it was on my way to get tuned. They tuned it, runs terrific. Even went back and forth to NY the week after the tune.

Well, 4k miles (NY trip + 1 month) after the tune I got the SES light so I did a manual reset using the gas pedal and stop/start button sequence. It lasted 430 miles and came back. I went to Autozone yesterday and used their reader to show the code, P2A03, and I reset it again. 42 miles later it came back on. Now tonight I'm seeing P2A03 and P2A00 on the reader. I emailed my tuner a few minutes ago and hopefully I'll get a quick response.

I know I have not bottomed out in the car, I'm very careful. The car doesn't sound any different, my ears don't detect a leak. This is annoying. The car doesn't appear to be running any differently either. Seems like I have full power.

I have had the issues since installing my MXP test pipes. And had my car tuned. I believe its the 02 sensors need to be replaced.

Huh, subd for solution. I'm planning to have tune done this fall; hopefully you get to the bottom of your issue.

There goes your tune....

Shouldn't be the case. I'm still able to scroll thru the maps after resetting my ecu. The UpRev is still there.

If you had an UpRev tune, did your tuner eliminate the inputs fro the 2 rear o2 sensors? He should have. And you'd never throw that code again.

Doesn't look like it....

If he eliminated them then the SES wouldn't be coming on

Yes, that's right. He should have eliminated the inputs from the 2 rear sensors, left the heaters on (for cold start idle issues), and you would never see that CEL again no matter what you do to the exhaust.

So you haven't had an SES light since your tune? How many miles on your tune so far? I made it a little over 4000 miles and then it came on.

Well, not very many. But there is no input from those two sensors... so I'll never see that code again (and I did before the tune). And no, I haven't had any trouble. (only 1K miles since tune)

By eliminating inputs from 2 rear o2 sensors, do you mean permanently disabling them or temporarily disable them while tune is being done?

Permanently remove their inputs to the ECU.

Huh, thx for info. My tune just got indefinitely bumped :tiphat:

I have the same 2 codes after I installed my art pipes..

I got the a tune thinking it would fix it but it came back after a 100 miles. Thought it could have been my stillen G3 so I took it off. After another 100 miles the same codes came back. So I definitely know it's the Art pipes that's causing it. Funny how the Art pipes V1 I had prior didn't cause CEL codes.

ART V1 or V2?


footloose, you got the V2 right?

you think there is a solution for the issue? i just used my hypertech to clear the code.

^ you just clear it each time it pops up?

ya I clear the code and it comes back like a two weeks later.

Well I found the reason for my cel issue. Turned out that one of the cai pipes heading into the right throttle body worked loose from the hose clamp and the motor was sucking unmetered air. I put things back the way they should be and I haven't seen that code in over a month.( my bad).:bowrofl:

Yes, your tuner can eliminate those two inputs with Osirus when he does your tune. I'm very surprised that those that are doing these UpRev tunes don't realize that and remove them. Especially with the high flow exhaust systems that most people change to. Those two rear sensors just don't have a wide enough voltage spread (bandwidth) to operate without throwing codes. Solution = remove their inputs.... and NEVER throw another code from them.

Got same problem v2 + my amazing jingles lol

I'm currently trying to get rid of a "permanent" code P2A03 right now. I had an exhaust leak at the header/test pipes on the driver side for about 200 miles. The code confirms 02 bank 2 sensor 1, which is the driver side sensor. The car immediately threw a CEL. I fixed the leak two weeks ago and shortly after cleared the CEL with an OBDII scanner. The code is still showing after two resets. Any idea how to eliminate the code? Will the pedal ECU reset do the trick?