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What does it mean when the i-stop yellow light is on?

3 Answers

EvanFitz

07/25/25 6:41am

i-stop yellow light indicates that the auto start-stop system is turned off. The solutions are: 1. Press the ignition switch twice without stepping on the brake; 2. Press the i-stop switch for 10 seconds; 3. Start the car and turn the steering wheel from the far left to the far right; 4. Turn off the engine and let it sit for more than 10 minutes. The working principle of the auto start-stop system is: When the car stops due to traffic congestion or at an intersection, and the driver steps on the brake pedal to stop and shift gears, the Start or Stop system automatically detects that the engine is idling and no gear is engaged, the wheel speed sensor of the anti-lock system shows zero, and the electronic electromagnetic sensor shows there is enough energy for the next start.

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LeoLynn

08/11/25 1:09pm

I've encountered the i-Stop yellow warning light several times, which indicates an issue with the auto start-stop system. It usually occurs when the system detects insufficient battery charge or unsuitable operating temperatures, such as during cold starts when the system automatically disables itself. While driving, this won't affect the vehicle's normal operation, but the auto start-stop function will be temporarily suspended. I recommend checking your battery condition - if it's aging or depleted, replace it as needed. Also, check if there are any other trouble codes on the instrument panel. In my case, it was caused by a failing battery, and the light went off after replacement. Regular maintenance of the battery and electrical system can prevent many minor issues.

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StBrandon

09/27/25 5:34am

The i-Stop yellow light indicates a system malfunction, commonly caused by sensor failure or low voltage leading to auto start-stop deactivation. From my experience, battery aging is the primary culprit, while sensor issues like faulty temperature detectors can also trigger it. The vehicle remains safe to drive, and the disabled function won't affect fuel efficiency. I recommend monitoring for persistent illumination for a few days and attempting a restart after turning off the engine. If unresolved, promptly visit a repair shop for circuit diagnostics. Regular vehicle maintenance can minimize such warnings, as the system is designed for energy conservation and emission reduction.

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