What is the reason for the engine self-check light not illuminating and the car failing to start?
1 Answers
When the engine self-check light does not illuminate and the car fails to start, this situation is generally caused by a loose connection in the engine power circuit or corrosion in the ECU wiring due to water ingress. It is recommended to seek further inspection at a professional auto repair shop. When the car engine is not functioning properly and the self-diagnostic system does not output any fault codes, it is particularly necessary to rely on the operator's inspection and judgment to determine the nature and location of the fault. Below is relevant information: Sensor issues: Sensors include those for coolant temperature, crankshaft position, air flow, intake air temperature, and oxygen. When these sensors are damaged, have poor contact, or experience signal interruption, the car's ECU cannot accurately obtain engine data, which can cause the engine self-check light to illuminate. Maintenance issues: Poor engine maintenance is the most common reason for the engine self-check light to illuminate. Vehicles have specific maintenance cycles, and if the owner does not adhere to the maintenance schedule, combined with poor driving habits, it will increase the burden on the engine's operation. Oil quality issues: Oil quality includes both fuel and engine oil. If the owner does not add the appropriate oil as required, prolonged use can lead to engine wear.
