What does the activation of the vehicle performance limitation function mean?
2 Answers
The activation of the vehicle performance limitation function means that the vehicle's working condition is abnormal. To ensure safety, the vehicle's computer limits the engine's power output, resulting in poor acceleration and insufficient power. The following are the possible causes: Insufficient oil pressure: Insufficient oil pressure, poor operation of the oil pump. The oil filter or injector may be clogged. Clutch-related issues: At 3K RPM, the speed should be around 100, and if the vehicle does not accelerate properly or lacks power, it could be due to clutch-related issues (oil leakage or wear). The problem might be less noticeable when the engine is cold, but as the temperature rises (during driving), the likelihood of frequent occurrences increases, and the vehicle might even "stop" moving (when the clutch plate is completely burnt out). Motor failure: Issues with the throttle body, such as sticking or failure of the stepper motor. Catalytic converter blockage: There may be a blockage or obstruction in the exhaust system or at the connection points.
Last time I was driving on a mountain road, I also encountered this situation where the car suddenly couldn't accelerate. The performance limitation function is like the car's self-protection mechanism. When the onboard computer detects issues with critical systems, such as engine overheating, unstable battery voltage, or sensor failures, it automatically limits the power output. At this point, you'll notice that even with the accelerator pedal floored, the car won't speed up, and sometimes even the air conditioning automatically downgrades. This isn't the car being lazy; it's preventing more serious mechanical damage. If you encounter this situation, don't push it—slow down immediately, pull over, and check the water temperature gauge and warning lights. Once, this very function saved me from a major engine overhaul—it was a lifesaver.
