How to Deal with the Exhaust Gas Warning Light?

1 Answers
DakotaFitz
07/30/25 9:24am
Start and turn off the vehicle three times in a row, or disconnect the negative terminal of the engine battery, wait for 30 seconds, and then reconnect it. After completing these steps, check if the engine warning light on the dashboard is still on. If the warning light remains on and the vehicle cannot start after being turned off, you should call for a tow truck. If the vehicle can still be driven but exhibits severe shaking, lack of acceleration power, or other symptoms, it is recommended to stop driving immediately. This not only prevents further damage to the engine but also ensures personal safety. Here is additional information: Engine Exhaust System: The illumination of the engine exhaust system warning light is often caused by damage to the oxygen sensor in the three-way catalytic system or poisoning of the catalytic converter due to poor fuel quality in the country. If this light comes on while driving, immediately reduce speed and proceed to the nearest service station for inspection and repair.
Was this review help?
7
4
Share
More Forum Discussions

What engine does the Roewe 550 use?

The Roewe 550 is equipped with the 18K4G engine, which delivers a maximum horsepower of 133Ps, a maximum power output of 98KW at 6000rpm, and a peak torque of 170Nm. The engine of the Roewe 550 is assembled by BAIC Group Co., Ltd., with technical support provided by BAIC, making it a domestically produced engine. For daily maintenance of the Roewe 550's engine, the following methods can be employed: Use lubricating oil of the appropriate quality grade. For gasoline engines, select SD--SF grade gasoline engine oil based on the additional equipment of the intake and exhaust systems and usage conditions. For diesel engines, choose CB--CD grade diesel engine oil according to mechanical load, with the selection standard not lower than the manufacturer's specified requirements. Regularly change the engine oil and filter. The quality of any grade of lubricating oil will deteriorate over time during use. After a certain mileage, the performance degrades, leading to various engine issues. To prevent malfunctions, change the oil regularly based on usage conditions and maintain an appropriate oil level. As oil passes through the fine pores of the filter, solid particles and viscous substances accumulate in the filter. If the filter becomes clogged and oil cannot pass through the filter element, it may rupture the filter or open the safety valve, allowing oil to bypass through the relief valve and carry contaminants back to the lubrication areas, accelerating engine wear and increasing internal contamination. Periodically clean the crankcase. During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and cylinder walls, mixing with metal particles from component wear to form sludge. Small amounts remain suspended in the oil, while larger amounts precipitate, clogging filters and oil passages, making engine lubrication difficult and causing wear. Regularly use a radiator cleaner to flush the radiator. Removing rust and scale deposits not only ensures proper engine operation but also extends the overall lifespan of the radiator and engine.
8
1
Share

How to Deal with Foggy Windows on Rainy Days in a Car?

When driving in the rain and encountering foggy windows, you can use the air conditioning system to defog. Turn on the front window defogging mode, set the fan speed to maximum, switch on the A/C, and adjust the temperature to the lowest setting. The fog on the windows will disappear shortly. Additionally, some car models come with heated rear windshields and side mirrors. Simply press the switch to activate the heating, and the fog will clear in about a minute. Here are some methods to prevent window fogging on rainy days: 1. Proper use of the air conditioning system: Park the car, start the air conditioning, adjust the temperature control to the warm air setting, and press the defogging button to dry the windshield with warm air. 2. Use specialized anti-fog products: Spray evenly on the windows and wipe clean before each use to form a transparent protective film that prevents fogging. 3. Open windows to allow air circulation: If the fog is not heavy, slightly open the side windows to let the inside and outside air mix, gradually equalizing the temperature and dispersing the fog. 4. Use dish soap with a dry cloth: Mix dish soap with water (ratio 1:6), apply evenly on the interior windows with a sponge, and wipe dry with a car towel once it dries, leaving no watermarks. This method usually keeps the windows fog-free for up to 20 hours.
6
1
Share

What are the symptoms of unstable engine idle speed?

Unstable idle speed of a car engine mainly manifests in the following aspects: 1. The tachometer needle fluctuates up and down during idle, showing instability. 2. Vibration occurs during idle. The following are the reasons for unstable idle speed: 1. Clogged fuel injector: Leads to insufficient fuel supply pressure. Clogging of fuel injectors is usually caused by gum and carbon deposits in gasoline. 2. Faulty water temperature sensor: The car's water temperature sensor is generally installed on the engine block (or possibly on the water jacket of the cylinder head) and directly contacts the coolant (antifreeze) to measure the temperature of the engine coolant. Once the water temperature sensor fails, the car may experience unstable idle speed, difficulty starting when cold, inability to increase speed, and significantly increased fuel consumption. 3. Faulty throttle position sensor: The throttle position sensor detects whether the engine is in idle condition or under load operation, and whether the car is accelerating or decelerating. Damage to the throttle position sensor can cause engine vibration and unstable idle speed. 4. Air intake system leakage: The ECU controls the mixture concentration primarily based on intake air information such as water temperature, throttle opening, and engine speed provided by the air flow meter. Leakage in the intake air system can cause the ECU to inaccurately control the intake air volume, leading to unstable engine idle speed. 5. Exhaust system blockage: Causes poor exhaust, resulting in symptoms such as weak acceleration, reduced power, and unstable idle speed. 6. Weak spark from individual spark plugs: Leads to cylinder misfire, causing unstable engine idle speed, and may also result in black smoke from the exhaust pipe, reduced power, and backfiring.
3
0
Share

Load Index and Speed Rating?

1. Meaning of Load Index: The numerical value indicating the maximum load that a tire can bear under specified conditions when inflated to its maximum air pressure. It is usually represented by a number. If the total weight of the vehicle exceeds this value, the tire deformation will be significant, leading to increased heat generation during prolonged operation, ultimately causing tire fatigue damage, reduced lifespan, and even structural failure resulting in a blowout accident. 2. Meaning of Speed Rating: It is denoted by a letter, ranging from J to Z. Under the corresponding load capacity of the relevant load index, each letter represents the maximum permissible speed of the tire.
19
3
Share

Where to Register a Tricycle in Beijing?

In Beijing, tricycles can be registered at the vehicle management office in the residential area, but they must comply with the national "General Technical Conditions for Electric Bicycles" and be included in Beijing's electric bicycle product catalog. Relevant information about license plates is as follows: 1. Introduction: License plates, commonly known as vehicle plates, refer to the plates hung at the front and rear of a vehicle, displaying the vehicle's registration number, registration area, or other relevant information. 2. Function: License plates serve as a numbering and information registration system for vehicles. Their primary purpose is to identify the vehicle's region of registration and to trace the vehicle's owner and registration details through the license plate number.
3
0
Share

How to Check Traffic Violations for a Vehicle Not Registered Under Your Name?

For vehicles not registered under your name, you can check traffic violations at the traffic violation processing hall or window of the traffic management department. Below is detailed information about vehicle violations: 1. Overview: Vehicle violations refer to acts where motor vehicles violate the Road Traffic Safety Law and traffic management regulations. Penalties for vehicle violations include warnings, fines (vehicle impoundment), temporary suspension of driver's license, revocation of driver's license, cancellation of driver's license, administrative detention, and criminal liability for acts constituting crimes. 2. Basis for Penalties: According to the 'Road Traffic Safety Law of the People's Republic of China', traffic management departments of public security organs and their traffic police should promptly correct road traffic safety violations. Penalties for road traffic safety violations should be imposed based on facts and relevant provisions of this law.
5
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.