Why does the Nissan Sylphy shake in D gear when waiting at a traffic light?

[LeLeilani]

Nissan Sylphy shakes in D gear when waiting at a traffic light for the following reasons: Abnormal transmission oil pressure: Abnormal transmission oil pressure can also cause the engine to shake in D gear, because the automatic transmission's oil pressure is constantly flowing in D gear, causing excessive oil pressure and resulting in abnormal shaking of the transmission. Deteriorated transmission oil: Deteriorated transmission oil and dirty oil passages can cause shaking in D gear. If the car has not had its oil passages cleaned or transmission oil changed for a long time, it is recommended to change the transmission oil and clean the oil passages. Additionally, damage to the rubber of the transmission mount can also cause abnormal shaking of the transmission.

[DiHarper]

My Nissan Sylphy has reached 50,000 kilometers. Recently, when stopped at traffic lights in D gear, the car body shakes noticeably, as if the engine is trembling. This is more pronounced during frequent starts in city traffic jams. I suspect long-term short-distance driving has caused carbon buildup on the throttle body or fuel injectors, affecting the air-fuel ratio and idle stability. The engine's RPM fluctuates significantly under D gear load. If the spark plugs are worn or the ignition coils have issues, it could also cause shaking. Additionally, if the CVT transmission's torque converter is worn, power delivery might become uneven. I found that trying to shift to N gear to see if the shaking disappears can help with initial diagnosis. Regular cleaning of the intake system and replacing spark plugs may prevent this issue; otherwise, fuel consumption will increase, and power output will weaken. I recommend going to a 4S shop for a computer diagnosis as soon as possible to prevent minor issues from turning into major repairs.

[CollinFitz]

Having been into cars for over a decade, I've encountered numerous Nissan models, and the D-gear vibration at red lights is quite common with the Sylphy. The core reasons mostly lie in the powertrain, such as malfunctioning engine idle control modules or sensor data deviations causing unstable RPM. As for the transmission, if the CVT's clutch plates are worn or the torque converter has issues, the pressure in D-gear transmits vibrations. Simple checks: neutral gear test to distinguish between engine and transmission problems; lift the car to inspect if engine mounts are aged or failed. When I drive the Sylphy and notice idle vibration, I check the tachometer for fluctuations—excessive ones warrant caution. A small tip: cleaning the throttle body and replacing the air filter are low-cost DIY fixes that can alleviate some symptoms and prevent transmission damage. Timely maintenance avoids chain reactions affecting safety.

[KevinDella]

I always emphasize safety first when driving. The Sentra shaking in D gear at a red light is quite frightening, as if the engine is about to stall. The causes often lie in the fuel system, such as clogged fuel injectors or unstable fuel pressure leading to insufficient air-fuel mixture, which increases the risk of idle shaking. Transmission issues, especially clutch problems under heavy load, can amplify the vibrations. This not only causes discomfort but may also result in sluggish response when starting at a green light, increasing the likelihood of rear-end collisions. It's recommended to immediately shift to N gear or engage the handbrake to observe changes when shaking occurs, which can alleviate symptoms. Don't ignore it—promptly check the sensors and circuits to ensure safe driving and prevent accidents.