What are the symptoms of a problematic three-way catalytic converter?

1 Answers
SamanthaMarie
07/29/25 6:29pm
The symptoms of a problematic three-way catalytic converter include: 1. Unpleasant exhaust odor; 2. Engine overheating and premature excessive wear; 3. Engine power loss and abnormal noises. The causes of three-way catalytic converter damage are: 1. Blockage due to sintering of deposits from ethanol gasoline gum, sulfur-phosphorus chemical complexes, lead-manganese metal deposits, or melting of ceramic carriers caused by engine exhaust flames; 2. Loss of activity of surface precious metals, rendering them ineffective for catalysis; 3. Prolonged exposure to high temperatures leading to thermal deactivation. The three-way catalytic converter is an external purification device installed in the automotive exhaust system, which converts harmful carbon monoxide, hydrocarbons, and nitrogen oxides from vehicle exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions.
Was this review help?
18
5
Share
More Forum Discussions

Can you drive through if the front wheels pass the stop line in the last second of the green light?

Yes. Only crossing the stop line and continuing to drive after the light turns red is considered running a red light. Driving while the light is still green is not a violation. However, from a safety perspective, it is not recommended to proceed if you have already reached the last second of the green light. Running a red light situation: If the vehicle just crosses the stop line when the light is red but stops immediately, this type of red-light running will not be penalized. However, if there is obvious movement after crossing the line, penalties will apply. The electronic eye captures three photos for running a red light: the vehicle crossing the stop line, followed by two more photos of the vehicle reaching the middle of the intersection and the opposite side of the intersection. Only when all three photos are complete will it be considered running a red light, resulting in a 6-point deduction under the new regulations. When there is a conflict between the traffic signal and a traffic officer's gesture: Motor vehicle drivers must obey the on-site command of the traffic officer. If a driver "runs a red light" due to the traffic officer's on-site command, they can obtain a flow adjustment certificate from the traffic police brigade at the scene to avoid penalties. If the party disagrees with the penalty, they can appeal through administrative reconsideration or administrative litigation.
4
2
Share

What is the difference between 4WD and 2WD in SUVs?

Differences between 2WD and 4WD in vehicles: 1. Different driving methods: 2WD: Two-wheel drive means only two wheels are the driving wheels, connected to the vehicle's power system. 4WD: Four-wheel drive refers to the vehicle maintaining a four-wheel drive form throughout the entire driving process. 2. Different fuel consumption: The four-wheel drive mode can provide better off-road and handling performance at any time, but cannot adjust torque distribution according to road conditions, and has higher fuel consumption. 3. Different number of differentials: 2WD: The vehicle differential can make the left and right (or front and rear) driving wheels rotate at different speeds. 4WD: In four-wheel drive, to drive all four wheels, all wheels must be connected. If the four wheels are mechanically connected together, a center differential needs to be added to adjust the speed difference between the front and rear wheels. Extended information: (1) Advantages of front-wheel drive: Easier to arrange the interior space for passengers, and the mechanical structure is simple and inexpensive, thus saving costs. (2) Advantages of rear-wheel drive: Better handling, as the rear wheels are responsible for driving, allowing the front wheels to focus on steering, making the vehicle's response during steering more agile.
19
1
Share

Can the Chery Ant Run on Highways?

Chery Ant can run on highways. According to highway regulations, the minimum speed requirement for vehicles on highways is 60 km/h, and the maximum speed must not exceed 120 km/h. The Chery Ant is equipped with a ternary lithium battery pack from CATL, with a total capacity of up to 32.2 kWh. It provides a maximum power of 30 kW and a maximum torque of 120 Nm, supplied by Yaskawa. It only requires half of a standard parking space, allowing for more vehicles of the same class and a more spacious interior driving area. The braking system of Chery's new energy vehicle, the Ant, performs excellently. As a small new energy vehicle, the Ant is also equipped with many braking systems specifically designed for higher-class vehicles, such as ABS anti-lock braking system and EBD braking system. These systems greatly enhance the safety of the Ant during braking. The Chery Ant may not look large, but as a three-door, two-seater microcar, it is actually medium to large in its class. Moreover, it is larger than the Smart Fortwo. With a simple structure and fewer components, maintenance workload is minimal. When using an AC induction motor, the motor requires no maintenance.
1
4
Share

What is the fuel consumption of the Volkswagen Tayron?

The Volkswagen Tayron offers three powertrain options: a 1.4T turbocharged engine with a maximum power output of 150 horsepower, and two 2.0T turbocharged engines with maximum power outputs of 186 horsepower and 220 horsepower respectively. To understand the actual fuel consumption of the Tayron, let's examine the following two models: 1. Volkswagen Tayron 1.4T: The 1.4T Tayron comes in two variants, both equipped with a 7-speed dual-clutch transmission. While the official combined fuel consumption figures from the Ministry of Industry and Information Technology appear relatively low, the actual average fuel consumption is around 9.0L/100Km. 2. Volkswagen Tayron 2.0T: The Tayron models equipped with the two 2.0T turbocharged engines also feature a 7-speed dual-clutch transmission. Their official combined fuel consumption figures are 7.3L/100Km and 8.0L/100Km respectively, while the actual fuel consumption is 9.16L/100Km and 10.36L/100Km respectively. The former figure corresponds to the 2.0T engine with a maximum power output of 186 horsepower.
16
3
Share

Is a Vehicle Considered Mortgaged If the Green Book Does Not Indicate a Mortgage?

When a user applies for a vehicle mortgage loan, there will typically be a line in the green book indicating the mortgage status. If this line is absent, it means the vehicle has not been mortgaged. Below is a detailed explanation: Reasons for this situation: It is highly likely that the user initially did not apply for a car purchase loan but instead opted for a bank's large-scale car loan credit card service. In such cases, the user only needs to repay the amount in installments, similar to a credit card, without the need to surrender the green book or register a mortgage. If none of the above scenarios apply, it is recommended that the user check the actual status of the vehicle at the local vehicle management office. Relevant proof: Since a vehicle that has not been released from mortgage cannot be traded or transferred, it is crucial for the user to be aware of this. It is advisable to bring the settlement certificate and other relevant documents to complete the mortgage release after the loan is fully repaid. Timely repayment: During the car loan repayment period, it is important to ensure that each installment is paid on time to avoid late payments. Severe delinquency may result in the vehicle being repossessed.
17
5
Share

Which model is Dongfeng Nissan eq7250ac?

eq7250ac refers to the 2011 Teana 2.5L CVT XL Leading Edition. 'eq' indicates a Dongfeng joint venture, while '7250ac' is a model code. The Teana is a flagship mid-to-high-end luxury sedan under the NISSAN brand. Below are the relevant details of this vehicle: 1. Dimensions: The 2011 Teana 2.5L CVT XL Leading Edition is a mid-size sedan launched by Dongfeng Nissan in 2010, with a displacement of 2496mL. Its body dimensions are 4850mm in length, 1795mm in width, and 1475mm in height, with a wheelbase of 2775mm. 2. Exterior: The 2011 Teana 2.5L CVT XL Leading Edition features a 4-door, 5-seater sedan body structure, equipped with a 6-speed CVT automatic transmission. It boasts a stylish, elegant, and stable appearance, with distinctive front headlights that exude vitality. The taillight design complements the front headlights, and the front fascia clearly displays the family characteristics with a sleek, streamlined feel.
20
3
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.