What are the symptoms of bad speed sensor in a Toyota Sienna 2003?

Symptoms of a bad speed sensor in a 2003 Toyota Sienna may include erratic or inaccurate speedometer readings, the vehicle's transmission may shift harshly or unpredictably, and the check engine light could illuminate. Additionally, you might experience issues with cruise control functionality and overall vehicle performance. If these symptoms occur, it's advisable to have the speed sensor checked and replaced as necessary.