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Engine Brake Laws No. CA Local / posted

California Engine & Jake Brake Rules

No statewide engine-brake ban. The legal hook is the muffler law (Veh. Code 27150): every truck needs an adequate muffler and no excessive noise, no cutout or bypass. The real restrictions are local 'no engine brake' signs backed by city ordinances, fines around $50 to $500. Watch the I-5 Grapevine, Sierra grade towns, and the Tahoe and Big Bear resort areas. Keep braking on open grades with no sign.

Ban scopeLocal / posted
Muffler lawYes (the legal hook)
Where postedNo statewide engine-brake ban
FineLocal noise-ordinance citation, commonly about $50 to $500
01 The rule

How California handles engine braking

No statewide engine-brake ban. The legal hook is the muffler law (Veh. Code 27150): every truck needs an adequate muffler and no excessive noise, no cutout or bypass. The real restrictions are local 'no engine brake' signs backed by city ordinances, fines around $50 to $500. Watch the I-5 Grapevine, Sierra grade towns, and the Tahoe and Big Bear resort areas. Keep braking on open grades with no sign.

02 On the road

What to watch for

California Engine Brake FAQ

Are engine brakes banned in California?
California has no statewide ban. The restriction is local and posted on "NO ENGINE BRAKE" signs. No statewide engine-brake ban.
Where are the "NO ENGINE BRAKE" signs in California?
No statewide engine-brake ban. The real restrictions are local 'no engine brake' signs backed by city or county ordinances. Watch the I-5 Grapevine approach into the valley, Sierra grade towns on I-80 and US 50, resort communities around Lake Tahoe and Big Bear, and noise-sensitive foothill neighborhoods. Enforcement is active in mountain and resort towns, thin across rural highways.
What is the fine for using an engine brake where it is banned in California?
Local noise-ordinance citation, commonly about $50 to $500. The state muffler violation (Veh. Code 27150) is a correctable 'fix-it' citation.

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 Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it.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://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=VEH&sectionNum=27150. See our Terms & Disclaimer.

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