How to Troubleshoot When the Engine Malfunction Light Comes On?
2 Answers
You can start and turn off the vehicle three times in a row, or disconnect the negative terminal of the engine battery, wait for 30 seconds, and then reconnect it. This can usually resolve the issue. Below are some related details: Source of the Engine Malfunction Signal: The engine malfunction signal is emitted by the ECU (Engine Control Unit), which controls all the electronic components of the engine, including the electronic throttle, fuel injectors, alternator, fuel pump, etc. It covers various systems such as intake, exhaust, fuel, ignition, and timing. Reasons for the Engine Malfunction Light Coming On: There are multiple reasons why the engine malfunction light may come on, including sensor-related issues such as the coolant temperature sensor, crankshaft sensor, oxygen sensor, etc. Other causes may include faulty spark plugs, ignition coils, fuel pump issues, or clogged fuel lines.
Having driven for so many years, the engine warning light coming on is a common occurrence that requires calm handling. I remember one time when the light came on, I immediately pulled over to avoid further damage. I popped the hood to check the oil level, coolant level, and whether the belts were loose or cracked—sometimes it's just a minor oversight. Then I plugged in an OBD scanner to read the fault code, which turned out to be an emission issue caused by a faulty oxygen sensor. After replacing the part at the repair shop, the light went off. Ignoring it long-term can lead to engine overload, skyrocketing fuel consumption, and even safety risks. I recommend keeping an affordable scanner handy for self-checks, along with regular oil and filter changes to prevent such issues—saving both money and hassle. Safety comes first; never overlook that little warning light.
