How to fix the P0846 fault in Nissan Sylphy?
3 Answers
When the P0846 fault code appears in a Nissan Sylphy, it is necessary to replace the transmission valve body. The P0846 fault code is a common issue with CVT transmissions in Japanese cars. When the P0846 fault code appears, the symptoms include the dashboard warning light turning on while driving, high engine RPM, and the vehicle's speed not increasing. If not addressed for a long time, the engine vibration will increase, and the transmission noise will become more severe. Connecting a diagnostic scanner to the vehicle's computer will display the P0846 fault code. Below are some relevant details about replacing the transmission valve body: 1. Replacing the transmission valve body is relatively expensive, estimated to cost over 10,000 RMB. It is recommended to purchase the valve body yourself and have a technician replace it, paying only for the labor cost, which can save a significant amount of money. 2. It is advised to promptly visit a 4S shop or a professional auto repair shop to have the issue diagnosed by a technician. Only after identifying the exact problem can the appropriate repair be performed.
My Nissan Sylphy once threw a P0846 trouble code, and the car felt like it was being dragged when driving, especially unsmooth. After checking the information, I learned that this is an issue with the transmission fluid pressure sensor, commonly seen in CVT transmissions. First, check the transmission fluid—if it's too dirty or too low from prolonged use, it can easily trigger the error. I tried changing the fluid myself, but the light remained on. Forums suggested resetting the trouble code using an OBD diagnostic tool, but that only provided a temporary fix. Later, I consulted a trusted mechanic who tested and found that the sensor itself was faulty, either due to poor wiring contact or internal short-circuiting. Replacing the new sensor cost just over 200 yuan and solved the problem. Ignoring it could lead to transmission overheating and wear, potentially costing thousands or even tens of thousands in repairs later. I recommend avoiding DIY risks since this involves delicate circuitry—it’s safer and more convenient to have it professionally scanned and diagnosed at a specialized shop.
When encountering the P0846 warning in a Sylphy, don't panic immediately. This indicates a low signal from the transmission fluid pressure sensor, possibly due to insufficient oil pressure or circuit issues. First, open the hood and check the automatic transmission fluid level and quality - if dirty, try replacing it with new fluid. Second, inspect wiring connectors for looseness or oxidation, clean them and reconnect. If the light persists, use a diagnostic tool to clear the code and test drive. For recurring issues, replacing the sensor becomes necessary, with market prices ranging from 200-500 RMB. The CVT sensor location in Sylphys is prone to problems, and DIY attempts might lead to misoperation causing transmission damage. When seeking repairs, choose a reliable shop and emphasize scanning the fault points. As a reminder, regular maintenance and fluid changes can prevent similar issues - my recommendation is changing fluid every two years or 60,000 km.
