code P0174 and P0151 on my zl1 out of nowhere

RyPG · 08-17-2023, 08:06 PM

i was driving my car pushing it a little. after i stop to get ice cream and i come back do remote start and it engine turns off after a few seconds so i knew a engine light came on. i took it to my tuner the next day he found nothing wrong with o2 sensor or anything on the car he cleared the codes and drove it for a day nothing came back after i get the car the same day codes comes back. btw on idle with cold engine the rev goes low than normally is for a second and it bumps back up in those few second the car shakes a little. did he miss something or whats going on? the car drive fine

-rotofab intake, speed engineering lt headers, borla axle back, and 93 tune

Megahurtz · 08-17-2023, 08:10 PM

Could be a failing O2, burnt wiring, or an exhaust leak near the passenger side front O2.

ZLRob · 08-18-2023, 12:06 AM

Quote:

Originally Posted by Megahurtz

Could be a failing O2, burnt wiring, or an exhaust leak near the passenger side front O2.

It certainly sounds like a burnt harness based on the codes and running condition.

2023_ZL1-AUTO · 08-18-2023, 06:20 AM

So, I also had these codes back when I was doing my mods/tuning process. After doing the exhaust work on my ZL1, these codes popped up during my first data logging session. It ended up being a short/grounded wire running from the drivers side O2 sensor. I accidently sheared one wires insulation located above the drivers CAT and below the break master cylinder/housing right as it comes up from under the car by the firewall. I guess it was grounding out? Anyway, I fixed it and it's been good since !

RyPG · 08-21-2023, 07:41 PM

Quote:

Originally Posted by 2023_ZL1-AUTO

So, I also had these codes back when I was doing my mods/tuning process. After doing the exhaust work on my ZL1, these codes popped up during my first data logging session. It ended up being a short/grounded wire running from the drivers side O2 sensor. I accidently sheared one wires insulation located above the drivers CAT and below the break master cylinder/housing right as it comes up from under the car by the firewall. I guess it was grounding out? Anyway, I fixed it and it's been good since !

I will put the car on the jack and check the 02 sensors!

08-17-2023, 08:06 PM	#1
RyPG Drives: 2018 camaro zl1 Join Date: Jan 2023 Location: Charleston,Zl1 Posts: 30	code P0174 and P0151 on my zl1 out of nowhere i was driving my car pushing it a little. after i stop to get ice cream and i come back do remote start and it engine turns off after a few seconds so i knew a engine light came on. i took it to my tuner the next day he found nothing wrong with o2 sensor or anything on the car he cleared the codes and drove it for a day nothing came back after i get the car the same day codes comes back. btw on idle with cold engine the rev goes low than normally is for a second and it bumps back up in those few second the car shakes a little. did he miss something or whats going on? the car drive fine -rotofab intake, speed engineering lt headers, borla axle back, and 93 tune

08-18-2023, 06:20 AM	#4
2023_ZL1-AUTO Drives: 2023 ZL1 Join Date: Dec 2022 Location: Columbus, Ohio Posts: 1,287	So, I also had these codes back when I was doing my mods/tuning process. After doing the exhaust work on my ZL1, these codes popped up during my first data logging session. It ended up being a short/grounded wire running from the drivers side O2 sensor. I accidently sheared one wires insulation located above the drivers CAT and below the break master cylinder/housing right as it comes up from under the car by the firewall. I guess it was grounding out? Anyway, I fixed it and it's been good since ! __________________ Katech Track Day CAM 38%•BTR Dual Valve Springs•Johnson Lifters•Trend 3/8 Chromoly Pushrods• VVT Del•CNC Heads•AFM Delete• C5-R Timing Chain•Katech Oil Pump•Katech 112mm•Maggie 2650 3.25” Upper/ATI SD w/10.32” +20%•10 Rib Belt•RFBG•FI IC Stage 2•THPSI Port w/875cc Inj•Katech Dual Fuel Pump•DSX Aux Pump•SW 2" Headers w/Legend NPP•GESI UHO 4.5" CATs•Brisk RR14S Plugs•BMR Motor Mounts•BMR Cradle Lockout &Bushings Kit•BMR Rear Suspension & 15" Conversion•DSS 1pc DS•RPM 6-Point Roll Cage•10lb FireSense+ w/4Fire SFI 17.1 Fire Sys•Weld Forged Vitesse Rear 17x10 Beadlocks-Front 18x6•Unlocked TCM

08-17-2023, 08:10 PM	#2
Megahurtz Snackbar Tuning Drives: 2023 SGM ZL1 Join Date: Oct 2016 Location: Florida Posts: 1,522	Could be a failing O2, burnt wiring, or an exhaust leak near the passenger side front O2.

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