What is the reason for the engine malfunction light being on and the throttle being weak?
2 Answers
The reasons for the engine malfunction light being on and the throttle being weak are: 1. Carbon deposits in the intake tract and piston top can cause poor atomization leading to incomplete combustion; 2. Excessive engine mileage, resulting in weakened spark plug performance; 3. Computer temperature correction issues causing insufficient light during startup; 4. Oxygen sensor failure; 5. Poor quality or substandard gasoline. The solutions for the engine malfunction light being on and the throttle being weak are: 1. Check if the air filter is clogged and clean it if necessary; 2. Inspect the throttle opening; 3. Check if the high-voltage wires, spark plugs, and high-voltage sparks are too weak; 4. Measure if the fuel pressure is too low, and inspect the electric fuel pump, fuel pressure regulator, and fuel filter if necessary.
I remember last time we talked about this issue of the engine malfunction light coming on with loss of power when accelerating. It's usually because the engine protection mode was activated—the computer detected a fault and automatically reduced power to prevent further damage. There are three common causes: First, sensor problems, such as false readings from the oxygen sensor causing an air-fuel ratio imbalance, which cuts power; second, intake or exhaust system blockages, like a dirty air filter reducing oxygen supply or a clogged catalytic converter preventing exhaust gases from escaping; third, ignition or fuel system failures, such as excessive carbon buildup on spark plugs or clogged fuel injectors, leading to inaccurate fuel delivery and sluggish acceleration. I recommend stopping in a safe place immediately—don't force it to avoid damaging more components. Checking the engine oil filter every six months can prevent 70% of such issues. If you have an OBD scanner on hand, scanning the trouble codes can quickly pinpoint the problem—spending a little money for professional repair is far better than getting stranded on the highway.
