2018 Duramax traction control light to limp mode

JeremiahJohnson

Joined: Dec 9, 2006

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6:06p, 3/4/26

AG

Traction control light and engine light popped on and goes into reduced power mode. Have to turn off and drive a bit but it goes back to normal temporarily. Did this 2 weeks ago for a few hours. Went away but it is back now. Any ideas? 2018 GMC 2500 duramax.

I am located in BCS. Best shops to take it?

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KRamp90

Joined: Sep 3, 2003

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6:59p, 3/4/26

AG

What's the code? Sounds like ABS module.
Autozone or O"Reiely's will scan for free.

JeremiahJohnson

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7:13p, 3/4/26

AG

I'll have to check tomorrow. Went earlier but alarm disappeared.

Did have a fuel rail sensor alarm and a few random ones that were unrelated. The traction alarm disappeared before they checked but of course came back on when I drove home. Went back into limp mode again on the way home.

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JeremiahJohnson

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8:04p, 3/5/26

AG

It was the Fuel Rail Pressure sensor if anyone else has a similar issue.

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KRamp90

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2:05p, 3/10/26

AG

I have a P0046 in my 2019 Dirtymax. Been at Henna going on four days. Not sure they know what they are doing...
I am glad you resolved your issue!

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