What does it mean when the istop and exclamation light come on together?
2 Answers
When the car's istop light is yellow, it indicates that the engine auto start-stop system is turned off. If it is flashing, it may indicate a malfunction in the auto start-stop system. When the car stops due to congestion or at an intersection, and the driver presses the brake pedal to stop and shift gears, the Start/Stop system automatically detects that the engine is idling and not in gear, and the wheel speed sensors of the anti-lock system show zero. Additional information: 1. Temporary parking on a slope: Try to avoid using the auto start-stop system. Because the start-stop system starts relatively slowly, it is easy for the vehicle to slide when releasing the brake, and the engine may not start in time, leading to insufficient braking power assistance, which can be dangerous. 2. Note: Most cars with a start-stop system will only blow air but not cool when the engine is off, significantly affecting passenger comfort. At the same time, if the system detects a large difference between the interior temperature and the set value, the engine will automatically start, and frequent start-up vibrations greatly reduce passenger comfort.
I've been in this business for years, and it's quite common to see the i-stop and exclamation mark lights come on together, usually indicating an automatic start-stop system malfunction. The issue could stem from the battery—if it's aged or has low voltage, the i-stop won't function. Sensor failures, like those in the throttle or emission sensors, can also trigger system errors. Software bugs may cause warnings too, sometimes disappearing after a car restart. Don't ignore it, as it might affect engine performance or even safety. First, check if the battery connections are loose or try replacing the battery. If the light persists, head to a repair shop immediately to scan for trouble codes with a diagnostic tool—don't delay and risk costlier repairs.
