Could be a failed knock sensor. This ignition knock sensor kit combines both necessary sensors and the wiring harness that joins them for a complete repair in one package.

Knock Sensor and Harness Kit 926-387 Features:

• Fits 1996-2003 Lexus Es300; 1999-2003 Lexus Rx300; 1994-2006 Toyota Camry; 2001-2003 Toyota Highlander; 1998-2003 Toyota Sienna; 1999-2003 Toyota Solara
• Complete solution — this knock sensor kit includes two knock sensors and the wiring harness that connects them
• Plug-and-play installation — matches original wiring harness, requiring no cutting or splicing
• Quality assured — benchmarked against original components for performance and quality
• Excellent value — original equipment quality at significant cost savings