Toyota Tundra check engine light on after tow control light issue and decreased fuel efficiency on Toyota Tundra

Some Toyota Tundra owners report experiencing persistent check engine light issues after encountering a tow control light problem and decreased fuel efficiency. These symptoms may indicate significant underlying problems, such as a malfunctioning gas cap, oxygen sensor issues, or an engine misfire. Additionally, the tow control light issue could signal a malfunction in the traction control system, potentially triggered by accidental button activation or more complex issues. Owners also note that decreased fuel efficiency may be linked to a loose or faulty gas cap, which can disrupt the fuel system's pressure balance, leading to leaks. To effectively address these concerns, it is recommended that owners diagnose the check engine light to identify the specific problem and consider resetting it as part of the troubleshooting process.