Melon
Seasoned Member
- Joined
- Jun 20, 2024
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- 331
- Location
- Baton Rouge, Louisiana
- V-Series Cadillac(s)?
- 2024 CT4 V Blackwing
You won't find this level of excitement on a BMW.
CT4BW's Turning Off - Safety Risk
- Thread starter blvckwing
- Start date
F1Scamp
Seasoned Member
Because they don't run long enough.
Lithoss
Seasoned Member
Happened to me today, no fun. I do have a non-insurance OBD tracker in my OBD port (Spireon). I've had it plugged for all 12k miles of the cars life (MY2023) and this is the first time it's happened. Not sure what to do, but going to unplug the tracker for a while I think about it
DamonTXCT4V_BW
New Member
- Joined
- Jul 24, 2023
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- 2
- Location
- Sugar Land TX
- V-Series Cadillac(s)?
- 2023 Cadillac CT4V Blackwing
Same thing has happened twice to me in the last 5 months. The last time was last Saturday (9/27) - Loss of brake assist, power steering, reduced engine power and limp mode. Dash lights up with CEL. I did have an OBD reader plugged in during both occurrences.
The codes after the 9/27 event were PC121 & PE418.
Luckily - I wasn't on the highway when this happened. It would be difficult at best to make it over to the shoulder in heavy traffic with no power.
I've got the OBD reader unplugged - trying to decide on how to proceed.
The codes after the 9/27 event were PC121 & PE418.
Luckily - I wasn't on the highway when this happened. It would be difficult at best to make it over to the shoulder in heavy traffic with no power.
I've got the OBD reader unplugged - trying to decide on how to proceed.
savethemanual
Seasoned Member
And I am presuming both you had the engine wiring harness recall done?
DamonTXCT4V_BW
New Member
- Joined
- Jul 24, 2023
- Messages
- 2
- Location
- Sugar Land TX
- V-Series Cadillac(s)?
- 2023 Cadillac CT4V Blackwing
To my knowledge - no. I purchased the car new in July 2023 and never received any notice for this recall.
Lithoss
Seasoned Member
I have had all recalls done.
It happened to me on the highway, in heavy traffic. Luckily I was already in the right lane and it was heavy enough traffic to only be moving at 30mph so it wasn't too hard to pull over safely.
My guess (big guess) is that something about GM's CAN implementation on the OBD gateway is buggy, maybe a timing thing, and when these OBD devices poll at just the right (wrong?) time it causes some failure.
If it is indeed something like that, good luck getting GM to acknowledge and fix it. OEM stance is always remove the 3rd party device.
Regardless, pretty piss poor handling of it by GM. Nothing done on the OBD side of that gateway should affect the vehicle while driving, ESPECIALLY safety specific functions.
It happened to me on the highway, in heavy traffic. Luckily I was already in the right lane and it was heavy enough traffic to only be moving at 30mph so it wasn't too hard to pull over safely.
My guess (big guess) is that something about GM's CAN implementation on the OBD gateway is buggy, maybe a timing thing, and when these OBD devices poll at just the right (wrong?) time it causes some failure.
If it is indeed something like that, good luck getting GM to acknowledge and fix it. OEM stance is always remove the 3rd party device.
Regardless, pretty piss poor handling of it by GM. Nothing done on the OBD side of that gateway should affect the vehicle while driving, ESPECIALLY safety specific functions.
savethemanual
Seasoned Member
I think the OBD is a false flag TBH.
Its most likely more of this-
Source: I was one of the first cars with this issue- it happened on my drive home from the dealership. Same exact symptoms.
Its most likely more of this-
Source: I was one of the first cars with this issue- it happened on my drive home from the dealership. Same exact symptoms.
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