Why do the EPC and engine indicator lights come on simultaneously?
1 Answers
epc and engine indicator lights come on simultaneously for the following reasons: 1. Sensor issues: The sensors mentioned here include coolant temperature, crankshaft position, air flow, intake air temperature, oxygen sensors, etc. When these sensors are damaged, have poor contact, or signal interruption, the car's ECU cannot accurately obtain engine data, which will cause the engine fault light to come on. 2. Maintenance issues: Poor engine maintenance is one of the causes of engine faults. We know that vehicles have a certain maintenance cycle. If the owner does not perform maintenance on schedule, coupled with poor driving habits, it will increase the burden on the engine operation, and ultimately, the fault light will come on to remind the owner of the need for maintenance. 3. Oil quality issues: The oil quality mentioned here includes fuel and engine oil. The fuel added to the car generally has a grade, and the engine oil is also divided into semi-synthetic and fully synthetic. The manufacturer usually recommends which grade of fuel and which type of engine oil the owner should use. If the owner does not add them as required, it will cause engine wear over time, and the lights will come on simultaneously. 4. Poor mixture combustion: Engine spark plug failure, ignition coil failure, fuel pump failure, fuel line blockage, etc., can all cause poor engine mixture combustion. Poor mixture combustion leads to engine carbon deposits or knocking problems, which will eventually be detected by the engine's oxygen sensor and reported to the ECU, naturally triggering the warning light. 5. Intake issues: The engine needs air intake during combustion, and the air filter element is very important in this process. If the car's air filter element is not clean and is not cleaned regularly, it will affect the car's air intake. Over time, it is likely to become clogged, and in severe cases, it will cause the engine fault light to come on.
