OFT Stage 2 but still getting O2 Sensor CE - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

kazmone1 · 03-06-2018, 11:38 PM

Hi, I installed a UEL on my 14 FRS, and flashed the ROM with an OFT Stage 2 UEL ots tune. Everything was good at first, but over the last 2 weeks I have gotten four different check engine lights all pointing to issues with the second 02 sensor.

Things i have done:
Used OEM new gaskets on all exhaust components for header and overpipe.
Replaced 02 sensor
Verified torque on header to head
Verified torgue on header to overpipe

Drivetrain Mods:
HKS airfilter
1320 headers
1320 overpipe
stock front pipe
Manzo M2 catback

I was under the impression that the stage 2 tune eliminated the 02 sensor reliance. Is that not the case? Anyone else have this problem?

NoHaveMSG · 03-06-2018, 11:46 PM

I don't have my laptop in front of me and am kinda drunk right now bu go to CEL's and see if p0420 is enabled.

skogs · 03-07-2018, 02:43 AM

I had the same issue. Just email a copy of the tune file you are using to customer support at openflash. They will fix it

steve99 · 03-07-2018, 05:33 AM

If your getting cel codes relared to rear o2 sensor then it likely the sensor was damaged during header install

Or you may have exhaist leaks do you have ltft over 10%.

If you intake is stock then its very unlikly its a tune problem .

List of codes would help

guybo · 03-07-2018, 05:45 AM

what are the CEL's specifically. List them.

kazmone1 · 03-07-2018, 10:39 AM

Error codes are p0139, p2097, p2098

The o2 isn’t damaged as it’s a brand new 02 sensor. Getting codes a day after install. Getting codes on other o2 as well.

I just reflashed my ecu with uel stage 2 again. I’ll see if maybe a bad flash

Teseo · 03-07-2018, 11:19 AM

Try to undo everything

kazmone1 · 03-07-2018, 11:38 AM

Here are two data logs. One before i reflashed and it was running like a dog (but no check engine lights). One after i just reflashed.

kazmone1 · 05-18-2018, 12:47 PM

Bump. Still having the problem. Have replaced the o2 and new gaskets. Nothing keeps it from coming back.

NyC Zn6 · 05-18-2018, 01:09 PM

Quote:

Originally Posted by kazmone1

Bump. Still having the problem. Have replaced the o2 and new gaskets. Nothing keeps it from coming back.

Looks like the tune did not disable the CEL. Reach out to Shiv and have him look at this.

guybo · 05-18-2018, 02:33 PM

the tune disables the P0420, that's it. It does not effect the operation of either O2 sensor. One of them is not even an o2 sensor, it's an Air Fuel sensor.

Just because your O2 sensor is new, does not mean it is working right. Get it tested at a shop that can look at the output of the sensor. Also, it could be a case of damaged wiring.

skogs · 05-23-2018, 04:52 PM

I had the exact same problem, turned out to be an issue with the tune. Openflash modified the tune and now it works.

steve99 · 05-23-2018, 08:40 PM

Quote:

Originally Posted by kazmone1

Bump. Still having the problem. Have replaced the o2 and new gaskets. Nothing keeps it from coming back.

which 02 did you replace those codes are for rear 02. not the front 02.

If you removed the rear 02 completly that wont work unless you modify tune. the standard tunes just disable the cat converter check function, if you complety remove rear 02 you need to make other adjustments to tune

NoHaveMSG · 05-23-2018, 09:01 PM

What calid are you using?

03-06-2018, 11:38 PM	#1
kazmone1 Member Join Date: Aug 2014 Drives: Car Location: California Posts: 11 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	OFT Stage 2 but still getting O2 Sensor CE Hi, I installed a UEL on my 14 FRS, and flashed the ROM with an OFT Stage 2 UEL ots tune. Everything was good at first, but over the last 2 weeks I have gotten four different check engine lights all pointing to issues with the second 02 sensor. Things i have done: Used OEM new gaskets on all exhaust components for header and overpipe. Replaced 02 sensor Verified torque on header to head Verified torgue on header to overpipe Drivetrain Mods: HKS airfilter 1320 headers 1320 overpipe stock front pipe Manzo M2 catback I was under the impression that the stage 2 tune eliminated the 02 sensor reliance. Is that not the case? Anyone else have this problem?

03-07-2018, 05:33 AM	#4
steve99 Banned Join Date: Dec 2013 Drives: FT86 Location: Australia Posts: 7,998 Thanks: 1,035 Thanked 4,987 Times in 2,981 Posts Mentioned: 598 Post(s) Tagged: 2 Thread(s)	If your getting cel codes relared to rear o2 sensor then it likely the sensor was damaged during header install Or you may have exhaist leaks do you have ltft over 10%. If you intake is stock then its very unlikly its a tune problem . List of codes would help Last edited by steve99; 03-07-2018 at 06:53 AM.

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03-07-2018, 02:43 AM	#3
skogs Member Join Date: Apr 2017 Drives: GT86 2013 Location: Norway Posts: 55 Thanks: 13 Thanked 15 Times in 8 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I had the same issue. Just email a copy of the tune file you are using to customer support at openflash. They will fix it

03-07-2018, 05:45 AM	#5
guybo Huge E85 fan! Join Date: May 2016 Drives: 2016 Scion FRS Location: Tampa, FL, USA Posts: 1,850 Thanks: 539 Thanked 1,010 Times in 605 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	what are the CEL's specifically. List them.

03-07-2018, 10:39 AM	#6
kazmone1 Member Join Date: Aug 2014 Drives: Car Location: California Posts: 11 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Error codes are p0139, p2097, p2098 The o2 isn’t damaged as it’s a brand new 02 sensor. Getting codes a day after install. Getting codes on other o2 as well. I just reflashed my ecu with uel stage 2 again. I’ll see if maybe a bad flash

03-07-2018, 11:19 AM	#7
Teseo Senior Member Join Date: Jun 2014 Drives: frs Location: Gunsai Posts: 4,877 Thanks: 7,146 Thanked 2,922 Times in 1,769 Posts Mentioned: 23 Post(s) Tagged: 2 Thread(s)	Try to undo everything

05-18-2018, 12:47 PM	#9
kazmone1 Member Join Date: Aug 2014 Drives: Car Location: California Posts: 11 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Bump. Still having the problem. Have replaced the o2 and new gaskets. Nothing keeps it from coming back.

05-18-2018, 02:33 PM	#11
guybo Huge E85 fan! Join Date: May 2016 Drives: 2016 Scion FRS Location: Tampa, FL, USA Posts: 1,850 Thanks: 539 Thanked 1,010 Times in 605 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	the tune disables the P0420, that's it. It does not effect the operation of either O2 sensor. One of them is not even an o2 sensor, it's an Air Fuel sensor. Just because your O2 sensor is new, does not mean it is working right. Get it tested at a shop that can look at the output of the sensor. Also, it could be a case of damaged wiring.

05-23-2018, 04:52 PM	#12
skogs Member Join Date: Apr 2017 Drives: GT86 2013 Location: Norway Posts: 55 Thanks: 13 Thanked 15 Times in 8 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I had the exact same problem, turned out to be an issue with the tune. Openflash modified the tune and now it works.

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