Help! Check engine light when going down hills with jake brake on

Mar 28, 2022 #21

Bagg daddy! Bobtail Member

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: Mar 28, 2022

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SpankingGT said: ↑

I made my way home yesterday and going thru the wonderful hills of colorado, my check engine light comes on. The light comes on when I'm going down hill with the jakes on but as soon as I blip the throttle-the light goes off. Light dosent come on going up hill but just down hill only with jakes on.

Any idea what this could be, dealer couldn't replicate the problem.

Thank You
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Bagg daddy!, Mar 28, 2022

#21

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Mar 28, 2022 #22

Bagg daddy! Bobtail Member

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: Mar 28, 2022

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Yes I would say change out your fuel filters had the same weird issues.

Bagg daddy!, Mar 28, 2022

#22

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Help! Check engine light when going down hills with jake brake on

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