Diesel truck maintenance company co-owner admits violating Clean Air Act

TACOMA, Wash. — The co-owner of two businesses involved in diesel truck sales and service pleaded guilty on Monday in U.S. District Court in Tacoma, Washington, to violating the Clean Air Act, U.S. Attorney Tessa M. Gorman has announced.

Sean Coiteux, 50, admits he directed employees to tamper with federally-required pollution control hardware on hundreds of diesel trucks and with the trucks’ pollution monitoring systems, according to a news release.

Coiteux and his wife, Tracy Coiteux, 46, own Racing Performance Maintenance Northwest of Ridgefield, Washington, and a related Woodland, Washington, company, RPM Motors and Sales NW.

Racing Performance Northwest also pleaded guilty to violating the Clean Air Act. RPM Motors and Sales pleaded guilty to Conspiracy to violate the Clean Air Act. Coiteux and both companies are scheduled for sentencing by U.S. District Judge Benjamin H. Settle on June 24, 2024.

In the plea agreement, Coiteux admits that between January 2018 and January 2021, he directed employees to delete pollution control software and devices on diesel trucks it sold or serviced. Coiteux’ companies charged between $1,000 and $2,000 for this work. Over three years Coiteux’ companies did this work on approximately 375 diesel trucks, for $538,477 in fees.

“By removing required pollution control devices, the defendants caused their customers’ diesel trucks to spew pollutants into the air at a rate of up to 1,200 times the pollution caused by compliant trucks,” Gorman said. “This conduct increased toxins in our environment that are linked to cancer, as well as pulmonary, neurological, cardiovascular, and immune system damage. The pollution causes particular harm to disadvantaged communities who live near freeways and other high traffic areas.”

According to records in the case, Coiteux directed his employees to modify legally required software that works to ensure the vehicle’s pollution remains within legal limits.

RPM Motors and Sales sometimes offered, as part of the sale of a truck, to remove the emissions control system after the customer purchased a truck.  Email and other electronic records document the conspirators’ purchase of equipment and software kits to remove the pollution control and reprogram the monitoring systems.

These modifications, which are known as “tunes” and “deletes,” are marketed to truck owners as improving vehicle power and performance.

Tracy Coiteux, 46, remains charged in the case and is scheduled for trial on May 20, 2024.

In September 2022 service manager, Nick Akerill, 44, pleaded guilty in Clark County Superior Court to a Motor Vehicle Emission Control Systems Violation and was sentenced to serve on a work crew for 30 days.

Each violation of the federal Clean Air Act is punishable by up to two years in prison and a $250,000 fine.

Prosecutors have agreed to recommend no more than six months in prison for Coiteux.  Judge Settle is not bound by the recommendation and can impose any sentence allowed by law.

The case is being investigated by Environmental Protection Agency’s Criminal Investigation Division.

The case is being prosecuted by Assistant United States Attorneys Seth Wilkinson and Cindy Chang and Environmental Protection Agency Special Assistant United States Attorney Karla Gebel Perrin.

John Worthen

Born in Pine Bluff, Arkansas, and raised in East Texas, John Worthen returned to his home state to attend college in 1998 and decided to make his life in The Natural State. Worthen is a 20-year veteran of the journalism industry and has covered just about every topic there is. He has a passion for writing and telling stories. He has worked as a beat reporter and bureau chief for a statewide newspaper and as managing editor of a regional newspaper in Arkansas. Additionally, Worthen has been a prolific freelance journalist for two decades, and has been published in several travel magazines and on travel websites.