Why does a new car show an engine fault?
1 Answers
There are several possible reasons why a new car shows an engine fault: 1. Sensor issues. Sensors include those for coolant temperature, crankshaft position, air flow, intake temperature, oxygen, etc. When these sensors are damaged, have poor connections, or signal interruptions, the car's ECU cannot accurately obtain engine data, which can trigger the engine fault light. 2. Maintenance issues. Vehicles have specific maintenance schedules. If the owner fails to follow the schedule and has poor driving habits, it can increase the burden on the engine. 3. Fuel quality issues. If the owner does not use the required fuel type, prolonged use can cause engine wear. 4. Poor combustion of the air-fuel mixture. Faulty spark plugs, ignition coils, fuel pumps, or clogged fuel lines can all lead to poor combustion. 5. Air intake issues. A dirty air filter that is not cleaned regularly can affect the car's air intake, potentially leading to blockages over time. 6. Turbocharger issues. Problems with the intake boost pipes or turbocharger can also trigger the engine fault light. 7. Exhaust system issues. This includes the rear oxygen sensor, catalytic converter, exhaust camshaft, and bearings. 8. Anti-theft system. A malfunctioning anti-theft system can prevent the engine from operating normally and may also trigger the engine fault light.
