What are the causes of exhaust system failure in GAC Trumpchi GS5?
4 Answers
Generally, exhaust system failures are mainly caused by the following points: three-way catalytic converter, oxygen sensor, and fuel. Additional information: 1. Exhaust system: refers to the system that collects and discharges exhaust gases, including the exhaust manifold, exhaust pipe, muffler, tailpipe, and resonator. 2. Function of the exhaust system: The automobile exhaust system mainly discharges the exhaust gases produced by the engine, while reducing the pollution and noise of the exhaust gases. For the car body, it plays a role in reducing vibration and noise, and prolonging the life of the exhaust muffler system. 3. The automobile exhaust system is mainly used in: light vehicles, mini vehicles, buses, motorcycles, and other motor vehicles.
A couple of days ago, my neighbor's Trumpchi GS5 encountered an exhaust system malfunction, which took quite a while to resolve. The common causes are mainly these three: the oxygen sensor gets clogged with carbon deposits, especially when exhaust temperatures are high combined with poor fuel quality, leading to inaccurate exhaust data and triggering the malfunction indicator light; the exhaust pipe gasket ages and leaks, particularly noticeable in northern winters due to significant thermal expansion and contraction; and the three-way catalytic converter gets blocked, often due to severe carbon buildup from long-term low-speed driving. I recommend first using a diagnostic tool to read the fault codes before rushing to replace parts. Once, I encountered a false fault caused by a loose sensor connector—cleaning the interface fixed it. If the catalytic converter is truly broken, don’t opt for cheap aftermarket parts; OEM parts, though more expensive, offer better compatibility. Also, avoid prolonged idling in daily use, and occasionally driving at high speeds is beneficial for the exhaust system.
Last time when I drove the GS5 to the western Sichuan plateau, I encountered an exhaust system malfunction. Here are some key lessons learned: The oxygen sensor is the most common failure point, especially the rear oxygen sensor, which is particularly sensitive in the high-altitude oxygen-deficient environment. Exhaust pipe weld cracks are also frequent occurrences - rough roads and vibrations can easily cause fractures. Many people overlook the exhaust bellows; prolonged exposure to high temperatures in that area leads to metal fatigue and gas leaks. A useful trick is to listen for exhaust sounds when the engine is cold - a hissing noise usually indicates a leak. A garage owner taught me a practical method: apply soapy water to the connections, and bubbles forming after starting the engine reveal leak points. Always request an exhaust seal test when replacing parts, otherwise fault codes may reappear after repairs. Regularly using quality fuel additives can delay catalytic converter aging.
The exhaust system faults of Trumpchi GS5 are mostly concentrated in several components. Oxygen sensor failure can lead to abnormal fuel trim, triggering the malfunction indicator light and causing a surge in fuel consumption; exhaust pipe corrosion and perforation are common in areas where de-icing agents are used; detached welds inside the muffler can cause abnormal noises; the most troublesome issue is a clogged three-way catalytic converter, which not only reduces power but may also cause exhaust high temperatures that damage surrounding wiring harnesses. It is recommended to inspect the exhaust pipe hanger rubber bushings every 20,000 kilometers, as aging and cracking can cause uneven stress on the exhaust system. Don't panic when the engine malfunction light comes on—first check if the fuel tank cap is tightened, as sometimes vapor leakage can falsely indicate an exhaust fault. When replacing the three-way catalytic converter, choose one with the original factory code, otherwise, it may fail the annual emission inspection.
