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Mincading · 06-06-2020, 04:16 PM

Hi All,

Was told to post here to get some insight on what to do.

Background
April 2020
Brought car to a shop to install Gruppe-S UEL Headers
OFT Tuned for Stage 2+
Ran for a month no issues

Issue
After said month, felt loss of power, thought I just sucked at driving manual
CEL Popped after driving 1-2 hours
Scanned the code for P0030 And P0134.

Let it sit overnight, cleared the codes and it drove normally (no loss in power).
Drove for another hour, CEL popped again.

Attempted fix
Tried to reseat the O2 sensor (right side/gray connector)
Replaced O2 sensor (DENSO 2349136 {#22641AA640, 22641AA66A, SU00300425}).
Cleared the CEL and drove it for a week no issues (though trips were <1 hour)

Drove 1.5 hours, CEL popped.
Checked the fuse according to this thread.
Checked the EFI(HTR) and it was fine. No issues based on visual inspection.

Follow up #1
Near the end of the 1.5 hour trip mentioned above, a loud sound could be heard on deceleration and/or hitting regular road bumps (non potholes. Think line-fillers).

I initially thought it was it was my front lip falling off on one side and scraping the road. Stopped the car, checked it out, nothing was scraping. It sounded like sand paper against concrete, or a front lip scraping the road.

Follow up #2
Today I took off the underbody panel and saw this (i didnt install the header; took it to a shop).

Checked for exhaust leaks, didn't feel any air on hand. Checked O2S1 Voltage Deltas and got this:

The question now is this: Why does the O2S1 sensor report no activity seemingly after longer trips? Inconsistent Electrical connection due to heat?

Any insight is appreciated!

Thanks!

06-06-2020, 04:16 PM	#1
Mincading Member Join Date: Apr 2019 Drives: 2013 Scion FRS Location: ON Posts: 16 Thanks: 0 Thanked 9 Times in 7 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	P0030 and P0134 Hi All, Was told to post here to get some insight on what to do. Background April 2020 Brought car to a shop to install Gruppe-S UEL Headers OFT Tuned for Stage 2+ Ran for a month no issues Issue After said month, felt loss of power, thought I just sucked at driving manual CEL Popped after driving 1-2 hours Scanned the code for P0030 And P0134. Let it sit overnight, cleared the codes and it drove normally (no loss in power). Drove for another hour, CEL popped again. Attempted fix Tried to reseat the O2 sensor (right side/gray connector) Replaced O2 sensor (DENSO 2349136 {#22641AA640, 22641AA66A, SU00300425}). Cleared the CEL and drove it for a week no issues (though trips were <1 hour) Drove 1.5 hours, CEL popped. Checked the fuse according to this thread. Checked the EFI(HTR) and it was fine. No issues based on visual inspection. Follow up #1 Near the end of the 1.5 hour trip mentioned above, a loud sound could be heard on deceleration and/or hitting regular road bumps (non potholes. Think line-fillers). I initially thought it was it was my front lip falling off on one side and scraping the road. Stopped the car, checked it out, nothing was scraping. It sounded like sand paper against concrete, or a front lip scraping the road. Follow up #2 Today I took off the underbody panel and saw this (i didnt install the header; took it to a shop). Checked for exhaust leaks, didn't feel any air on hand. Checked O2S1 Voltage Deltas and got this: The question now is this: Why does the O2S1 sensor report no activity seemingly after longer trips? Inconsistent Electrical connection due to heat? Any insight is appreciated! Thanks!