Texas Statutes
Subchapter K. Provisions Relating to Other Vehicle Equipment
Section 547.605. Emission Systems Required

Sec. 547.605. EMISSION SYSTEMS REQUIRED. (a) The engine and power mechanism of a motor vehicle shall be equipped and adjusted to prevent the escape of excessive smoke or fumes.
(b) A motor vehicle or motor vehicle engine, of a model year after 1967, shall be equipped to prevent the discharge of crankcase emissions into the ambient atmosphere.
(c) The owner or operator of a motor vehicle or motor vehicle engine, of a model year after 1967, that is equipped with an exhaust emission system:
(1) shall maintain the system in good working condition;
(2) shall use the system when the motor vehicle or motor vehicle engine is operated; and
(3) may not remove the system or a part of the system or intentionally make the system inoperable in this state, unless the owner or operator removes the system or part to install another system or part intended to be equally effective in reducing atmospheric emissions.
(d) Except when travel conditions require the downshifting or use of lower gears to maintain reasonable momentum, a person commits an offense if the person operates, or as an owner knowingly permits another person to operate, a vehicle that emits:
(1) visible smoke for 10 seconds or longer; or
(2) visible smoke that remains suspended in the air for 10 seconds or longer before fully dissipating.
(e) An offense under this section is a misdemeanor punishable by a fine of not less than $1 and not more than $350 for each violation. If a person has previously been convicted of an offense under this section, an offense under this section is a misdemeanor punishable by a fine of not less than $200 and not more than $1,000 for each violation.
Acts 1995, 74th Leg., ch. 165, Sec. 1, eff. Sept. 1, 1995. Amended by Acts 2001, 77th Leg., ch. 1075, Sec. 6, eff. Sept. 1, 2001.

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