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Engine Brake Laws No. UT Local / posted

Utah Engine & Jake Brake Rules

Utah has no statewide engine-brake ban. The state rule is a muffler and noise statute (Utah Code 41-6a-1626): working muffler, no cutout or bypass. The bans drivers hit are local ordinances on posted signs at canyon bottoms feeding the Wasatch Front, like Parleys Canyon on I-80, US-6 through Price and Spanish Fork Canyon, and around Park City. A muffler defends a noise ticket, not a posted zone. Brake freely on grades with no sign.

Ban scopeLocal / posted
Muffler lawYes (the legal hook)
Where postedZones sit at the canyon bottoms feeding the Wasatch Front: Parleys Canyon on I-80 into Salt Lake, US-6 through Price and Spanish Fork Canyon, Provo Canyon on US-189, Sardine Canyon on US-89, plus the Park City resort
FineLocal noise-ordinance citation set by the town or county, commonly about $50-$500

A detail here is flagged medium confidence — confirm with the state DMV or the local ordinance before you rely on it.

01 The rule

How Utah handles engine braking

Utah has no statewide engine-brake ban. The state rule is a muffler and noise statute (Utah Code 41-6a-1626): working muffler, no cutout or bypass. The bans drivers hit are local ordinances on posted signs at canyon bottoms feeding the Wasatch Front, like Parleys Canyon on I-80, US-6 through Price and Spanish Fork Canyon, and around Park City. A muffler defends a noise ticket, not a posted zone. Brake freely on grades with no sign.

02 On the road

What to watch for

Utah Engine Brake FAQ

Are engine brakes banned in Utah?
Utah has no statewide ban. The restriction is local and posted on "NO ENGINE BRAKE" signs. Utah has no statewide engine-brake ban.
Where are the "NO ENGINE BRAKE" signs in Utah?
Zones sit at the canyon bottoms feeding the Wasatch Front: Parleys Canyon on I-80 into Salt Lake, US-6 through Price and Spanish Fork Canyon, Provo Canyon on US-189, Sardine Canyon on US-89, plus the Park City resort. Enforcement is real at these grade-bottom towns.
What is the fine for using an engine brake where it is banned in Utah?
Local noise-ordinance citation set by the town or county, commonly about $50-$500.

Reference information for planning, not legal advice. Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it. Last reviewed July 2026. Source: https://le.utah.gov/xcode/Title41/Chapter6a/41-6a-S1626.html. See our Terms & Disclaimer.

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