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Started on my 500 breakin miles and got a CEL at 40 miles for an emissions issue. Not too concerned but a bit surprised. Car has probably 30 cold starts without being driven up to full temp. My guess is computers and sensors need to talk for a bit until they are in full agreement that all is well. I'm thinking it will go out after a few drive cycles. I got it out on the freeway twice and up to full temp. Have others had this happen? If so, did it go out eventually?
Update: I cleared the emissions code P2254 last night when I got home from work and took the car for a 20 mile freeway run and it stayed off. Car is running and shifting perfectly. If it come back at any point it will go to the dealer. Appreciate everybody's input. Wanted to share this in case someone else runs into the same situation with their C8
My guess is computers and sensors need to talk for a bit until they are in full agreement that all is well. I'm thinking it will go out after a few drive cycles.
This is not a sound diagnostic approach. A CEL is set BC a hard failure has occurred somewhere in the power train, but you need the code(s) that was/were set to understand it.
You appear to be describing drive cycles which can be "not ready" until certain miles under certain conditions are driven. Drive cycles do not set CELs. Most CELs do not reset themselves. Only a very few out of several hundred do such as leaving the gas cap loose. When it is replaced, then after some number of restarts that CEL will extinguish.
You should take the advice and get the code(s) read. If it were mine, I wouldn't be trying to "drive" the CEL out. Really doesn't work that way.
30 cold starts with only 40 miles on the odometer??? For the most part, any time you start the car up, it should be driven around and brought up to operating temp.
Museum delivery car, a few starts there and I drove it 6 miles there. Loaded on plycar and a few starts doing that. A couple more starts to unload and put in my garage for two weeks. To a PPF place to get done so a few starts there. Today was the first day out one the highway and I varied speed, kept it under 3K. I'm probably way off saying 30 cold starts but it was several without getting it fully up to operational temp. Spoke to Onstar and it has thrown code P2254. I'll clear it tonight and I'll get it out on the freeway Saturday for a good 100 mile run and report back.
From: SUFFIELD CT USA 2023 C8 CORVETTE UN-MODIFIED FINALIST
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Originally Posted by 2L8ULUZ
Museum delivery car, a few starts there and I drove it 6 miles there. Loaded on plycar and a few starts doing that. A couple more starts to unload and put in my garage for two weeks. To a PPF place to get done so a few starts there. Today was the first day out one the highway and I varied speed, kept it under 3K. I'm probably way off saying 30 cold starts but it was several without getting it fully up to operational temp. Spoke to Onstar and it has thrown code P2254. I'll clear it tonight and I'll get it out on the freeway Saturday for a good 100 mile run and report back.
I feel better now.... but I'm still having another beverage !
Started on my 500 breakin miles and got a CEL at 40 miles for an emissions issue. Not too concerned but a bit surprised. Car has probably 30 cold starts without being driven up to full temp. My guess is computers and sensors need to talk for a bit until they are in full agreement that all is well. I'm thinking it will go out after a few drive cycles. I got it out on the freeway twice and up to full temp. Have others had this happen? If so, did it go out eventually?
Take that immediately to a dealer, that should never happen. That color is growing on me
The Front Oxygen Sensor (O2 Sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.
The Front Oxygen Sensor (O2 Sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.
Thanks for that info, I'm at work and haven't had time to research the code. Like I said, I think it just needs to get out and get a good highway run. Too many rich open loop not up to operating temp starts!!
A P2254 is the upstream O2 sensor on bank 2 that is consistently reporting out of an expected voltage range. The ECU cannot use the signal when is out of an expected, usable voltage range. This voltage range is IMPORTANT as it governs how the ECU fuels the cylinders on bank 2. The ECU is having difficulty maintaining fuel trims on bank 2.
If you're going to just delete the code and take it for a drive, it should come back pretty quickly. This fault won't correct itself.
The Front Oxygen Sensor (O2 Sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.
Thanks for that info, I'm at work and haven't had time to research the code. Like I said, I think it just needs to get out and get a good highway run. Too many rich open loop not up to operating temp starts!!
Glad it's not mine; I'd have read the code immediately and likely had it in to the dealer by now... but, to each his/her own. All the best, in any event.
I was asking tisigwing about his comment of the possibility of your transmission failing. It’s annoying that people just throw that out there for anything.
You could say I think my seat is wearing to fast and someone will say it’s caused by the transmission.
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Your car so do as you feel appropriate, but I would recommend you get the car to the dealer and have them do any needed repair. That is why you have a warranty. After spending so much on the car, you hopefully would want it to be running in top shape.
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Check engine light at 40 miles
