Uprev tuned, but still CEL

SnooPPP · 10-06-2012, 12:08 AM

I've had my car uprev tuned for a couple months now. I've gotten it done through Z Car Garage. I have ARK HFC, and full exhaust. I just recently got the Service Engine Soon light to show up. I checked the code and its P0420, which usually has something to do with the exhausts/cats.

Is it still possible to get a CEL with an uprev tune concerning HFCs or could it be something else causing the CEL? Should I take my car to the dealer to check it out? I live in California so I'm afraid they'd say something dumb about me modifying the cats. Unfortunately Z Car Garage is too far away for me to just go to have them look.

Baer383 · 10-06-2012, 09:53 AM

Some codes your tuner can shut off show they don't show up again call them and see.

birdmanx1 · 10-06-2012, 09:59 AM

exhaust leak? cats issue??

Baer383 · 10-06-2012, 10:39 AM

Quote:

Originally Posted by birdmanx1

exhaust leak? cats issue??

I think he may have a bird in his tail pipe.

Baer383 · 10-06-2012, 11:18 AM

Quote:

Originally Posted by birdmanx1

exhaust leak? cats issue??

I think he may have a bird in his tail pipe.

birdmanx1 · 10-06-2012, 11:32 AM

Quote:

Originally Posted by Baer383

I think he may have a bird in his tail pipe.

touché !!!

jcosta79 · 10-06-2012, 01:23 PM

Did they turn off your rear 02 sensors when they tuned the car? If not, that may be the reason for your CEL.

anthonyy · 10-07-2012, 12:53 AM

Same exact same thing happened to me today. Got it tuned at Z Car Garage as well...
I have cat back exhaust and test pipes. Drove it for about 4k miles and got a CEL today...

anthonyy · 10-08-2012, 02:09 PM

To add to this. I think they just need to turn off the light. But I'm gonna have them check for leaks and make sure that the oxygen sensors are intact. Going in Wed, will update then.

10-06-2012, 12:08 AM	#1 (permalink)
SnooPPP Base Member Join Date: Feb 2011 Location: Sacramento Posts: 158 Drives: 09 370z Touring Rep Power: 14	Uprev tuned, but still CEL I've had my car uprev tuned for a couple months now. I've gotten it done through Z Car Garage. I have ARK HFC, and full exhaust. I just recently got the Service Engine Soon light to show up. I checked the code and its P0420, which usually has something to do with the exhausts/cats. Is it still possible to get a CEL with an uprev tune concerning HFCs or could it be something else causing the CEL? Should I take my car to the dealer to check it out? I live in California so I'm afraid they'd say something dumb about me modifying the cats. Unfortunately Z Car Garage is too far away for me to just go to have them look. Last edited by SnooPPP; 10-06-2012 at 12:58 AM.

10-06-2012, 09:53 AM	#2 (permalink)
Baer383 A True Z Fanatic Join Date: Aug 2010 Location: Lawrenceville,Ga Posts: 4,293 Drives: My foot up your azz Rep Power: 30	Some codes your tuner can shut off show they don't show up again call them and see. __________________ 2013 ZL1 754 rwhp 747 rwtq

10-06-2012, 09:59 AM	#3 (permalink)
birdmanx1 A True Z Fanatic Join Date: Jun 2010 Location: Baltimore, MD Age: 95 Posts: 3,175 Drives: 370z Nismo Rep Power: 24	exhaust leak? cats issue?? __________________ 370Z NISMO #0462 \| ClearBra \| 3M tint \| Head/Taillights \| Dynamat \| Black Roof \| Tommy Kaira HB \| CF Parts \| Berk HFCs \| FI SS \| NST Pulleys \| Takeda aFe \| K&N \| H&R Spacers \| Swift Spec R \| SPC F&R \| Zuperman M370 Nismo Vid \| Nismo Journal \| Nismo Rumble

10-06-2012, 01:23 PM	#7 (permalink)
jcosta79 A True Z Fanatic Join Date: Jul 2012 Location: N/A Posts: 1,430 Drives: N/A Rep Power: 15	Did they turn off your rear 02 sensors when they tuned the car? If not, that may be the reason for your CEL. __________________ 2012 PW NISMO #0559 - GT Spec Brace Kit - Swift Springs - ARK TP & Invidia CBE K&N Intake - UpRev Tune - 15mm Z1 Spacers & Studs - StopTech Slotted Rotors & SS Lines - ZSpeed CMAK with Stage 2 Clutch and Lightweight Flywheel

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10-07-2012, 12:53 AM	#8 (permalink)
anthonyy A True Z Fanatic Join Date: Apr 2011 Location: Los Gatos, CA Posts: 1,027 Drives: Lexus CT Rep Power: 16	Same exact same thing happened to me today. Got it tuned at Z Car Garage as well... I have cat back exhaust and test pipes. Drove it for about 4k miles and got a CEL today...

10-08-2012, 02:09 PM	#9 (permalink)
anthonyy A True Z Fanatic Join Date: Apr 2011 Location: Los Gatos, CA Posts: 1,027 Drives: Lexus CT Rep Power: 16	To add to this. I think they just need to turn off the light. But I'm gonna have them check for leaks and make sure that the oxygen sensors are intact. Going in Wed, will update then.