P.T. Services, Inc., a company in Memphis that repairs diesel engines, has pleaded guilty to breaking the Clean Air Act after modifying and deleting emissions control systems for customers.
What happened: On September 16, 2025, a court accepted P.T. Services' guilty plea. The company admitted to altering diesel engines, removing or tampering with the devices meant to track and control emissions.
- These changes are illegal under federal law, which bans tampering with or disabling emissions controls on any vehicle.
- Federal investigators with the EPA and FBI looked into the case before charges were filed.
The consequence: P.T. Services agreed to pay $150,000 as a penalty for the violations, according to the U.S. Department of Justice.
The plea deal wraps up the case, with the fine set as part of the agreement with federal prosecutors.