Toyota Camry rough idle, lack of power, and strong fuel smell traced to ECU issue on Toyota Camry

Submitted by GeoffW1 · Jun 23, 2025
Published by RepairPal

Problem overview

Some Toyota Camry owners report experiencing issues such as a rough idle, lack of power, and a strong fuel smell, which may be linked to problems with the Engine Control Unit (ECU). These owners note that a rough idle can stem from factors like vacuum leaks, ignition coil issues, or misfiring. Additionally, those experiencing a lack of power often find it related to the fuel system, potentially due to a clogged fuel filter or a malfunctioning fuel pump. Furthermore, a strong fuel smell is frequently reported as a sign of ECU malfunction, as the ECU is crucial for regulating the air-fuel mixture and ignition timing. It is essential for owners to address these issues promptly to maintain their vehicle's performance and safety, and seeking a professional mechanic's help for ECU-related concerns is highly recommended to avoid further complications.

1 person reported this problem
1 comment
Schedule Repair

Toyota Camry vehicles with this problem

1 model year affected
Average mileage: 150,000 miles
(150,000 - 150,000)

Search for another problem

RepairPal Car Genius

Ask our experts about your Toyota.

RepairPal Car Genius™ is a free resource for vehicle owners seeking advice on maintenance, auto repair, shop inquiries, estimates, and finding a trustworthy repair shop in your area.

 Auto Repair Expert Auto Repair Expert

Call us at 877-913-1554

Available 9am – 6pm ET Monday through Friday

Call Our Experts