What are the symptoms of a transmission solenoid valve failure in the 2014 Nissan X-Trail?
3 Answers
When the transmission solenoid valve fails, the following phenomena may occur: 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, problems such as metal spring issues in the socket or wiring problems on the plug (e.g., connecting the power wire to the ground wire) may prevent power from reaching the coil. It's best to develop a habit: after plugging the connector into the socket, tighten the fixing screw, and after placing the coil on the valve stem, tighten the fixing nut. 3. Problems with the solenoid valve core: Under normal pressure conditions of the medium flowing through the solenoid valve, if pressing the red manual button on the solenoid valve produces no reaction (no change in the medium's flow), it indicates that the valve core is definitely faulty. The valve core can be replaced, or the entire solenoid valve can be replaced altogether.
I've been driving a 2014 Nissan X-Trail for several years and have experienced obvious symptoms of solenoid valve failure. Initially, there was strong jerking during gear shifts, like the car hesitating when starting from a red light, or the gear not shifting up during sudden acceleration, with the engine RPM soaring but speed not increasing. Another common symptom was the yellow transmission warning light on the dashboard, occasionally accompanied by a hissing noise. If left unrepaired for a long time, the transmission temperature rises, fuel consumption increases significantly, and it can even lead to permanent damage, costing over ten thousand yuan to fix. That time, I had it towed to the dealership to read the fault codes, and the technician confirmed it was due to solenoid valve oil pressure failure. I recommend X-Trail owners change the transmission fluid regularly and have it checked every 40,000 kilometers to avoid minor issues turning into major repairs. Safety comes first when driving—if you notice a problem, pull over and don't risk continuing to drive.
As someone who frequently repairs cars, the symptoms of transmission solenoid valve failure in the 2014 X-Trail are varied. Customers often report noticeable delays in gear shifting, such as the car not moving for several seconds after shifting to D from a stop. Alternatively, there may be strong jerking sensations while driving, especially when changing lanes, where the car body lurches. In terms of unusual noises, there might be a rustling sound in the early stages of the fault, which can turn into a hissing noise as the problem worsens. Scanning with a diagnostic tool will display P0720 or other related fault codes, indicating an error in the solenoid valve control signal. Long-term neglect can also lead to transmission slipping or overheating, a 20% increase in fuel consumption, or even complete failure. The solution is simple: park in a safe place and visit a professional shop as soon as possible for inspection and part replacement. Regular maintenance, including adding the appropriate transmission fluid, can prevent these issues and extend the vehicle's lifespan.
