What Do the Indicator Lights on a Vehicle's Instrument Panel Represent?

[Edward]

The indicator lights on a car's instrument panel include the engine fault indicator light, which illuminates when the engine's electronic control system, valve train system, or cooling system malfunctions or deviates from specified parameters. Common causes are as follows: 1. Poor contact or damage to the oxygen sensor, preventing the computer from identifying the engine's combustion status, leading to failure in the emission control system. 2. Damage or poor contact in the camshaft or crankshaft sensors, causing incorrect ignition timing, incomplete fuel combustion, and severely reduced efficiency. 3. Poor contact or parameter changes in the throttle motor, throttle position sensor, air flow sensor, or absolute pressure sensor, making it difficult for the computer to accurately determine air supply, resulting in incorrect fuel-air mixture ratios and incomplete combustion. 4. Resistance value changes in the coolant temperature sensor, causing improper activation of the electric fan, leading to engine operating temperatures deviating from specifications or high temperatures that degrade cylinder and pipe sealing, reducing engine efficiency. 5. Impurities or water in the fuel, increasing pollutants in the cylinders, causing poor spark plug discharge, incomplete combustion, and non-compliant emissions. 6. Coolant leakage, raising temperatures in various engine parts and altering sensor parameters. 7. Poor contact in the fuel pump, leading to inadequate fuel injection and incomplete engine combustion.