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Old Mar 1, 2025 | 05:48 PM
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Default Service Active Handling

Hey everyone hoping to get some help here. After drifting in my c5z with traction and stability control off i got a sign in the dash saying, Service Active Handling. After i got done i turned the car off and turned it back on and the sign went away. This is the second time this has happened to me, is this something to worry about? After checking the cars codes the code is 28 TCS C1282 H.

Last edited by Ishvir; Mar 3, 2025 at 08:55 PM.
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Old Mar 1, 2025 | 06:33 PM
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Any codes stored? Did you make any recent changes or modifications to the car?
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Old Mar 1, 2025 | 06:39 PM
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Originally Posted by SideOfTheRoad
Any codes stored? Did you make any recent changes or modifications to the car?
the car is completely stock other than taillights, i don’t have a code reader so I am not sure but I don’t believe there should be, its only been about 2 months since i bought the car. It only has 27k miles
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Old Mar 1, 2025 | 06:47 PM
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Old Mar 1, 2025 | 06:56 PM
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My first 2002 vert had that error about twice a year for five years. Same result. I shut it off and restarted it and the error went away. Never addressed the problem and the car was salt water flooded in a hurricane.
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Old Mar 2, 2025 | 12:34 AM
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Moved to C5 Tech for further discussion.
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Old Mar 2, 2025 | 07:40 AM
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LED tail lights, by any chance? Been there, done that.
My guess is you have DTC C1291 or similiar stored in your EBCM. If so, read on.
The ABS system monitors the brakes by sending a 5V reference voltage through the brake bulbs. If the circuit is open (ex: burnt bulbs), it sets a code. LED lights have way higher resistance than the incandescent bulbs, so the module "sees" it as an open brake circuit.
You can either put back the OEM taillights, or you can install resistors in parallel to the taillights to simulate the bulbs being there.

Brake light resistor wired in parallel to the brake bulbs.
Brake light resistor wired in parallel to the brake bulbs.
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Old Mar 2, 2025 | 08:05 PM
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Originally Posted by SideOfTheRoad
LED tail lights, by any chance? Been there, done that.
My guess is you have DTC C1291 or similiar stored in your EBCM. If so, read on.
The ABS system monitors the brakes by sending a 5V reference voltage through the brake bulbs. If the circuit is open (ex: burnt bulbs), it sets a code. LED lights have way higher resistance than the incandescent bulbs, so the module "sees" it as an open brake circuit.
You can either put back the OEM taillights, or you can install resistors in parallel to the taillights to simulate the bulbs being there.

Brake light resistor wired in parallel to the brake bulbs.
Brake light resistor wired in parallel to the brake bulbs.
If this is the case would be bad for me to just leave it and not mess with it?
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Old Mar 3, 2025 | 07:40 AM
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The main issue here is you lose your traction control and/or active handling systems suddenly, at potentially the worst time; when you are driving aggressively. If you don't like the driving assist (and some people don't), then I guess its fine, however I would manually disable it pre-emptively so it doesn't drop out without warning.
If you feel you need it, I would either go back to stock taillights or install the resistors. The modification isn't all that hard to do, and the parts aren't expensive. I went with the resistors.
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Old Mar 3, 2025 | 07:41 PM
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Originally Posted by SideOfTheRoad
The main issue here is you lose your traction control and/or active handling systems suddenly, at potentially the worst time; when you are driving aggressively. If you don't like the driving assist (and some people don't), then I guess its fine, however I would manually disable it pre-emptively so it doesn't drop out without warning.
If you feel you need it, I would either go back to stock taillights or install the resistors. The modification isn't all that hard to do, and the parts aren't expensive. I went with the resistors.
What resistors did you use?
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Old Mar 3, 2025 | 10:34 PM
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I used the Sylvania LED load resistors. There are similar products on Amazon and potentially cheaper, but I picked these up locally. I used stainless steel wall plates as a heat sink/mounting plates, and attached them to the bumper frame between the trunk tub and the tail lights.

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Old Mar 4, 2025 | 06:22 PM
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I avoid resistors as they can get warm and hot.

I wire in a relay that is self contained and put it inline to protect from the heat.

Just my personal choice. Plastic cars don’t like hot things.
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