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C6 Corvette ZR1 & Z06General info about GM’s Corvette Supercar, LS9 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track
Had my heads fixed and Texas Speed and Performance long tube headers and catless xpipe installed and then had it tuned. They turned off the rear O2 sensors and it was running fine when I left. Next day I was going to get my windows tinted and the CEL came on. Turns out it's the primary O2 sensors. The tuners seemed to think the wire got too close to the headers and got melted but they still work and the installer used heat tape and pinned them up away from the headers. Earliest they could get me in to look at it is a week from tomorrow, so I wanted to see if anyone else had seen this code and had experience with it
Last edited by Toddiesel; 06-22-2022 at 07:32 PM.
Reason: added no cats
I don't think it will work that way. Front O2 sends a reading to ecm and the rear has to send a reading within spec. Without the fronts turned off also, the ecm thinks something is wrong.
I don't think it will work that way. Front O2 sends a reading to ecm and the rear has to send a reading within spec. Without the fronts turned off also, the ecm thinks something is wrong.
What do you mean "that way"? As in with the rears off? Both the dealership and the tuners were emphatic that I don't want to turn off the primary sensors.
What do you mean "that way"? As in with the rears off? Both the dealership and the tuners were emphatic that I don't want to turn off the primary sensors.
I'm not a tuner. But I don't see how it won't throw a code with just the rears turned off. Your fronts are still sending readings to the ecm with no readings from the rear. The ecm has to have both readings to measure the difference to see if they are in spec.
I'm not a tuner. But I don't see how it won't throw a code with just the rears turned off. Your fronts are still sending readings to the ecm with no readings from the rear. The ecm has to have both readings to measure the difference to see if they are in spec.
Well if you look at the codes, they're for like a heat element or something, so not a fuel error code.
Like I said I'm not a tuner so I don't know if you can turn off just a certain part of the O2 sensor. My understanding is it's all or nothing. Maybe some of the tuners on the forum will kick in and make us both understand how they work. I know a good tuner can do a lot of things to fool the ecm.
Like I said I'm not a tuner so I don't know if you can turn off just a certain part of the O2 sensor. My understanding is it's all or nothing. Maybe some of the tuners on the forum will kick in and make us both understand how they work. I know a good tuner can do a lot of things to fool the ecm.
Yes, you can turn off certain codes. The Corvette tech at the dealership is going to investigate next Thursday but until I can get the car in there I'm gonna be worried about it so I thought I'd see if anyone knew anything about these specific codes, especially if they've seen them with the setup I have.
Like I said I'm not a tuner so I don't know if you can turn off just a certain part of the O2 sensor. My understanding is it's all or nothing. Maybe some of the tuners on the forum will kick in and make us both understand how they work. I know a good tuner can do a lot of things to fool the ecm.
Rear o2 sensors are bank 1 sensor 2 and bank 2 sensor 2, they have no impact on the primary o2 (bank 1 and 2 sensor 1).
The code is for sensor 1 so the primary o2 sensors, the front ones. Circuit codes are wiring related, unplugged connector or broken wire.
Rear o2 sensors are bank 1 sensor 2 and bank 2 sensor 2, they have no impact on the primary o2 (bank 1 and 2 sensor 1).
The code is for sensor 1 so the primary o2 sensors, the front ones. Circuit codes are wiring related, unplugged connector or broken wire.
That's essentially what the tuner said (though he said wire might have gotten melted on the headers). When I talked to the installer he said that was extremely unlikely, but we won't know for sure till we get it up on the lift next thursday. Super annoying. Tuner said the O2 sensors are still working though, so if the wire was fucked, wouldn't it not work? I just want to make sure it's safe to drive around until then. Guess I could jack it up myself and go under there and look and see if there's any physical damage.
Last edited by Toddiesel; 06-23-2022 at 07:06 AM.
Reason: typo
I had a similar problem. Installed headers and the rear O2 extension connectors melted and threw codes for heater circuit. Shop turned off rear O2 and CEL went away.
I don't think it will work that way. Front O2 sends a reading to ecm and the rear has to send a reading within spec. Without the fronts turned off also, the ecm thinks something is wrong.
I'm sorry, but that is not correct.
The rear O2S diagnostics are turned off because, with no cats, they'd quickly turn on the MIL due to low cat efficiency. Turning off the DTCs for the rear sennsors does not affect operation of the front sensors.
Those four DTCs, P0030, P0050, P0053, P0059 are all fault codes relating to the O2S heater circuits for both front sensors. That all those DTCs are set at once tells me that it is likely that there is damage to the wiring harness leading to both the front sensors. That four codes are listed as "current" (ie: the O2S heaters were not working at the time you were logging data) as well as "pending" and "history" tells me that the sensors may not be working until the exhaust gets them hot enough to start sending data. Also, there may be times mainly at idle or during coasting that the sensors cool enough to stop sending data.
My guess is the wiring harness leading to the front O2Ses has been damaged and will need to be either repaired or replaced.
Headers will do that to wiring. It needs to be both shielded in the vicinity of the sensor locations and rerouted to keep the harness away from exhaust heat.
The rear O2S diagnostics are turned off because, with no cats, they'd quickly turn on the MIL due to low cat efficiency. Turning off the DTCs for the rear sennsors does not affect operation of the front sensors.
Those four DTCs, P0030, P0050, P0053, P0059 are all fault codes relating to the O2S heater circuits for both front sensors. That all those DTCs are set at once tells me that it is likely that there is damage to the wiring harness leading to both the front sensors. That four codes are listed as "current" (ie: the O2S heaters were not working at the time you were logging data) as well as "pending" and "history" tells me that the sensors may not be working until the exhaust gets them hot enough to start sending data. Also, there may be times mainly at idle or during coasting that the sensors cool enough to stop sending data.
My guess is the wiring harness leading to the front O2Ses has been damaged and will need to be either repaired or replaced.
Headers will do that to wiring. It needs to be both shielded in the vicinity of the sensor locations and rerouted to keep the harness away from exhaust heat.
Thanks for that post. Kinda confirms what the tuner said. The installer did shield the wires (he said) and secured them away from the headers. Hopefully it's an easy fix. And hopefully it won't be a big deal for me to continue to drive it for a week.
How many miles on the car? How many miles on the headers? I had issues burning up the heater elements on multiple sets of O2 sensors with TSP headers. Some have said its due to the distance where they are mounted on the header. I swapped to ARH and never had an issue again.
How many miles on the car? How many miles on the headers? I had issues burning up the heater elements on multiple sets of O2 sensors with TSP headers. Some have said its due to the distance where they are mounted on the header. I swapped to ARH and never had an issue again.
25k miles on the car. Like 50 miles on the headers, if that. ARH... O2 sensors?
How many miles on the car? How many miles on the headers? I had issues burning up the heater elements on multiple sets of O2 sensors with TSP headers. Some have said its due to the distance where they are mounted on the header. I swapped to ARH and never had an issue again.
Also, did that actually cause issues, or just an annoying CEL? if it's just going to be a CEL, I can just have them turn those codes off. I just don't know how important the heating element is. Seems like it's more for emissions than anything.
It was a few years ago. Can't recall if it affected anything.
You mentioned it happened a lot. You don't remember the ramifications of it? And where do I find these ARH O2 sensors? I googled it and didn't find anything
06-22-2022, 07:06 PM
primary O2 code after headers and a tune
