What are the reasons for the high fuel consumption of the Teana?
3 Answers
The reasons for the high fuel consumption of the Teana are: 1. Excessive carbon deposits inside the engine; 2. Spark plugs reaching the replacement cycle; 3. Engine oil reaching the replacement cycle. The solutions are: 1. Clean the carbon deposits inside the engine; 2. Replace the spark plugs; 3. Replace the engine oil. Taking the Teana 2021 2.0LXE Fashion Edition as an example, its body dimensions are 4901mm in length, 1850mm in width, and 1450mm in height, with a maximum power of 115kw. The car is equipped with a 2.0L inline four-cylinder naturally aspirated engine, paired with a continuously variable transmission, front suspension type of MacPherson independent suspension, rear suspension type of trapezoidal control arm multi-link independent suspension, and a unibody structure.
I've been driving the Teana for almost three years, and I deeply understand the sudden increase in fuel consumption. The most common issue is driving habits, such as frequently pressing the accelerator hard or braking suddenly, or running the air conditioning all summer while stuck in traffic. Later, I realized that having too much clutter in the car also has an impact—my trunk was always packed with two cases of bottled water, and the tire pressure was consistently low, making the car struggle to move. Carbon buildup in the engine is another thing to watch out for, especially for cars that frequently drive at low speeds in the city—a dirty throttle body can affect air intake efficiency. Also, aging spark plugs with insufficient ignition energy can lead to incomplete fuel combustion, which mechanics at the 4S shop can easily detect during maintenance. Don’t overlook fuel quality either—I filled up with cheap gas from small gas stations twice, and my fuel consumption spiked by 15%. Pay attention to these points regularly, get maintenance to clean carbon deposits, and the Teana’s fuel consumption can still be kept under control.
Having repaired cars for over a decade, I've encountered numerous cases of high fuel consumption in Teanas. First, let's discuss hardware factors: A faulty oxygen sensor can cause the ECU to misjudge the air-fuel ratio, leading to excessive fuel injection—black smoke from the exhaust is a telltale sign. Leaky fuel injectors or a malfunctioning fuel pressure regulator can result in over-supply of fuel. Problems with the mass airflow sensor can also cause the computer to miscalculate air intake. Regarding tires, worn-out treads or oversized replacements increase rolling resistance. The ignition system should also be checked—faulty spark plug wires or eroded spark plug electrodes need replacement. Don't overlook the drivetrain; aged CVT fluid can cause slippage, and delayed torque converter lock-up increases fuel consumption. Finally, installing xenon headlights or high-power electrical accessories may drain the battery, indirectly affecting fuel economy.
