What does it mean when the GAC GS4 displays 'Check Emission System'?

[Hall]

When the GAC GS4 displays 'Check Emission System,' it indicates a malfunction in the exhaust system. The causes of exhaust system failure include: 1. Fuel supply system and ignition system: Faults in the fuel supply system, ignition system, etc., can cause the engine to overheat, leading to sintering, peeling of the three-way catalytic converter carrier, and increased exhaust resistance. 2. Fuel or lubricating oil: Substandard fuel or lubricating oil can cause catalyst poisoning and reduced activity, thereby worsening vehicle performance, resulting in decreased power performance, increased fuel consumption, and deteriorated emissions. More related information is as follows: GAC GS4: The GAC GS4 is positioned as an 'International New Generation SUV.' The vehicle's length, width, and height are 4510mm, 1852mm, and 1708mm respectively, with a wheelbase of 2650mm.

[VanFinley]

I've been driving a Trumpchi GS4 for several years. When the dashboard displays the 'Check Emission System' warning, it means the car has detected an issue with the exhaust or control system. This is usually triggered by fault codes, such as a faulty oxygen sensor, a loose fuel cap, or a clogged catalytic converter causing excessive emissions. If not addressed promptly, the engine's fuel consumption will spike, the car will feel sluggish, and long-term damage to exhaust components could lead to costly repairs. I remember the first time I encountered this issue—I immediately tried tightening the fuel cap. If the light didn’t go off, I went to the 4S shop to read the OBD diagnostic codes, as emission system faults can cause the car to fail annual inspections. Regular maintenance checks on these sensitive components are recommended to prevent minor issues from becoming major problems—after all, safe driving is the top priority.

[TaylorDella]

Having worked in auto repair for 20 years, I often see this issue. The 'Check Emission System' light indicates the OBD-II system has detected a fault. Common causes include abnormal oxygen sensor readings, a stuck EGR valve, or unstable fuel pressure. These components control exhaust purification - malfunctions can increase fuel consumption by 20-30%, with severe cases causing black smoke. Don't attempt DIY fixes. First try tightening the fuel cap to see if the light goes off. If not, visit a professional shop for diagnostic scanning. Minor issues might just need a $10-20 sensor replacement, but delaying repairs could damage the catalytic converter costing thousands. During maintenance, emphasize cleaning related circuits to reduce carbon buildup and maintain proper emission standards.

[CaydenMarie]

The GS4 displays this warning when the ECU detects abnormal emissions. Possible causes include faulty oxygen sensor signals or reduced catalytic converter efficiency leading to excessive exhaust emissions. You can use a mobile app to connect to the OBD port and check specific error codes. Address the issue promptly to prevent power loss. Simple issues like a loose fuel tank cap may trigger false alarms - just reset the system.