How to Solve the Performance Limitation Issue in Land Rover Diesel Models?
2 Answers
To address the performance limitation issue, it is essential to first identify the root cause of the problem before taking appropriate measures to improve it. A thorough inspection of the vehicle is necessary. Remove the air filter connecting pipe above the carburetor and clean it with a specialized cleaning agent.
I've encountered this issue several times with my diesel Land Rover Discovery Sport. The performance-limited warning light is the most annoying, usually falling into three scenarios: lack of power when accelerating at low speeds is mostly due to a clogged DPF particulate filter—just drive at 80 mph for half an hour for automatic cleaning; sudden power limitation might be caused by a faulty turbocharger solenoid valve, which only costs a few hundred bucks to replace; black smoke and speed limitation after cold start are likely due to a stuck EGR exhaust valve, which can be fixed by disassembly and cleaning. Remember to add a bottle of fuel system cleaner every 5,000 km—the fuel injectors on China-6 diesel vehicles are too delicate. Just last week, I helped my cousin resolve this by maintaining 3,000 rpm in S mode on the expressway for twenty minutes, and the fault light went off by itself.