What are the symptoms of a faulty solenoid valve in an automatic transmission car?
2 Answers
When the solenoid valve in an automatic transmission is damaged, it mainly exhibits the following symptoms: 1. Solenoid valve coil short circuit or open circuit: First, use a multimeter to measure its continuity. If the resistance approaches zero or infinity, it indicates a coil short circuit or open circuit. 2. Issues with the solenoid valve plug/socket: If the solenoid valve has a plug/socket type connection, problems such as faulty metal springs in the socket or wiring issues on the plug (e.g., connecting the power wire to the ground wire) may prevent power from reaching the coil. 3. Problems with the solenoid valve core: Under normal pressure conditions of the medium passing through the solenoid valve, if pressing the red manual button on the solenoid valve produces no response (no change in the medium's flow), it indicates damage to the valve core.
I once experienced a failed solenoid valve in an automatic transmission car, and it was truly unpleasant to drive. At that time, there was always a delay when shifting gears—you'd step on the gas and wait several seconds for a response, as if the car was hesitating. Sometimes, it would also shake violently, especially during acceleration, making the steering wheel vibrate noticeably. The transmission warning light on the dashboard lit up too, glowing red, which was quite alarming. When I drove it to the repair shop, the mechanic said the solenoid valve malfunction was causing the gear to get stuck in a low position, making the engine rev frighteningly high and fuel consumption spike. If not addressed promptly, the entire transmission could have been ruined. I ended up spending some money to replace the faulty part, and now the car runs smoothly again. Everyone should pay attention to these small warning signs while driving to avoid turning them into major issues.
