What is the reason for the frequent central brake light error in the Audi A4L?

1 Answers
CharlieLee
07/29/25 4:53pm
The reasons for the frequent central brake light error in the Audi A4L are as follows: Reason 1: Brake light bulb failure. Reason 2: Wiring fault. Reason 3: Brake pedal not pressed. Reason 4: Brake light switch failure. Reason 5: Severe brake pad wear. Information about the Audi A4L is as follows: Active safety: The new Audi A4L is equipped with a new 8-speed multitronic continuously variable/manual transmission, providing smoother gear shifts and more efficient power transmission, enhancing driving comfort and fuel economy. Driving modes: There are three preset driving modes—Comfort, Dynamic, and Auto—and switching between them is simple with just one button.
Was this review help?
8
5
Share
More Forum Discussions

What is the function of the guide wheel?

The guide wheel has a flow guiding effect on the liquid and plays a torque-increasing role at low speeds. The guide wheel is the reaction element of the torque converter, a pulley used to guide the transmission belt through obstacles or change the direction of the transmission belt, located between the turbine and the pump wheel. Flow guiding effect on the liquid: The guide wheel of the torque converter has a flow guiding effect on the liquid, controlling the flow direction of the liquid. When the automatic transmission fluid flows from the turbine into the guide wheel, its direction changes, which enhances the rotational torque of the pump wheel, thereby increasing the output torque. Torque-increasing effect at low speeds: The guide wheel plays a torque-increasing role at low speeds. The principle is that the pump wheel, driven by the engine, causes the fluid to flow, forming a vortex that impacts the turbine to rotate, and then transmits the force to the turbine. Due to the guide vanes on the pump wheel and turbine, the fluid forms a circulating flow, moving cyclically between the pump wheel, turbine, and guide wheel. The force (FB) from the pump wheel fluid impacting the turbine is transmitted to the guide wheel, which cannot reverse or remains fixed, creating a reaction force (FD) acting on the turbine. The force received by the turbine (FT=FB+FD) is the torque-increasing effect of the guide wheel.
2
3
Share

What is the wading depth of the Model 3?

The wading depth of the Model 3 should not exceed half the height of the tires. Definition of vehicle wading depth: The wading depth of a vehicle is determined by the height of the engine air intake. For most compact and small cars with low ground clearance, the air intake position serves as the benchmark when driving through flooded roads. The function of the air intake is to draw in air. If the water level exceeds the height of the air intake, a large amount of water can be sucked into the engine, causing severe damage to the vehicle. Symptoms of water entering the engine air intake: When the engine air filter element gets soaked in water, it increases intake resistance and allows water to enter the combustion chamber. This prevents the spark plugs from igniting properly. Additionally, if water enters the distributor cap, it disrupts the normal ignition function of the distributor, leading to engine stalling while driving.
8
4
Share

Model Y Black or Gray?

For practicality and safety, choose gray; for a more imposing look, opt for black. Below are the relevant details: Vehicle Specifications: The Tesla Model Y measures 4750mm in length, 1921mm in width, and 1624mm in height, with a wheelbase of 2890mm. Vehicle Positioning: The Tesla Model Y is a mid-size SUV introduced by Tesla China, equipped with either a pure electric 431-horsepower motor or a pure electric 461-horsepower motor, with total power outputs of 317kW and 339kW respectively, paired with a single-speed electric transmission. Drivetrain: The Tesla Model Y features a dual-motor all-wheel-drive system, with a front suspension type of double-wishbone independent suspension and a rear suspension type of multi-link independent suspension. The steering assistance is electric power steering, and the body structure is unibody.
13
4
Share

Is the first maintenance mileage 5,000 kilometers or 3,000 kilometers?

Under normal circumstances, the maximum duration for the first maintenance is six months or 5,000 kilometers. If there are special instructions in the vehicle's manual, follow the time specified in the manual. First maintenance content: Replace engine oil and oil filter; Check the operation of the braking system, such as the gap and wear of brake pads and discs; Tighten bolts of various systems; Check and adjust the drive belt; Check and adjust tire balance and alignment; Check and replenish various fluids; Check the operation of components such as lights, battery, and shock absorbers. First maintenance precautions: During the first maintenance of a new car, pay attention to the inspection of tire tread and pressure, which is related to driving safety. Additionally, remove small stones and other debris stuck on the tires, ensuring the front and rear tire pressure is uniformly inflated to 2.4 kg/cm². Also, perform a four-wheel alignment check, inspect tire pressure and wear condition, and rotate the tires if necessary due to wear.
13
5
Share

How to Open the Rear Part of a Panoramic Sunroof?

Panoramic sunroof opening method: To tilt open, press the sunroof switch button, and the sunroof will tilt open. Below is extended information about panoramic sunroofs: 1. Panoramic sunroofs offer a wide field of vision and excellent ventilation, making them a highlight in mid-to-high-end vehicles. With a larger area compared to standard car sunroofs, they better maintain fresh air inside the car. At high speeds, they are more effective than side windows in reducing interior noise and can quickly lower the cabin temperature, making them an excellent cooling solution for cars exposed to the sun. 2. Panoramic sunroofs are categorized into three types based on their opening mechanism: sealed, segmented opening, and full opening, each with distinct features. Essentially, panoramic sunroofs are larger in area compared to regular sunroofs, often featuring an entire glass roof that provides an unobstructed view of the sky above. Currently, many panoramic sunroofs consist of two separate glass panels, front and rear, giving both front and rear seat passengers the experience of having a sunroof.
2
1
Share

How to Determine if the Expansion Valve is Faulty?

Signs of a faulty expansion valve: 1. The low-pressure pipe is not cold to the touch; 2. Frost forms on the dryer bottle; 3. Frost forms on the condenser; 4. A hissing sound is heard when the expansion valve or condenser is not operating; 5. Abnormal high and low pressure levels and abnormal temperature in the high-pressure pipe. Relevant information about the expansion valve is as follows: 1. Location of the expansion valve: The expansion valve is an important component in the refrigeration system, typically installed between the liquid reservoir and the evaporator. 2. Working principle of the expansion valve: The expansion valve converts medium-temperature, high-pressure liquid refrigerant into low-temperature, low-pressure wet steam through throttling. The refrigerant then absorbs heat in the evaporator to achieve the cooling effect. The valve flow is controlled by changes in superheat at the end of the evaporator to prevent insufficient utilization of the evaporator surface and knocking phenomena.
9
1
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.