What's the matter with all the fault lights on when Honda Civic is driving?

If the Civic fault light of Pacific Auto Network is fully turned on, it may be due to the poor proportion of combustible mixture in the car or insufficient combustion in the combustion chamber of the engine cylinder, resulting in the fuel system being too rich. It is necessary to check the oxygen sensor, replace the fuel injector and clean the throttle valve in the garage.

The fuel system is too rich, which may be due to insufficient air and intake pressure in the cylinder, resulting in insufficient fuel combustion in the cylinder. Common problems include dirty throttle and intake air, carbon deposit, three-way catalyst blockage, carbon deposit in spark plug, oxygen sensor and other component problems.

Solution to fully open urban fault lights

1. Check the cleanliness of the throttle valve. If the throttle is too dirty and there is carbon deposit, it is necessary to carefully clean the carbon deposit in the throttle and air intake;

2. Check whether the three-way catalytic converter is blocked. If it is blocked, clean it with special cleaning agent first. If the effect is not good, a new three-way catalytic converter needs to be replaced.

3. Remove the spark plug and check whether there is too much carbon deposit. If there is too much carbon deposit, clean the spark plug. After cleaning, check whether the spark plug works normally. If the spark plug is abnormal, replace it.

4. Use a multimeter to detect the voltage and resistance of the oxygen sensor in working condition, and then detect the waveform. If the oxygen sensor is damaged, it needs to be replaced.

No matter what causes the engine fault light to light up, it is necessary to use a computer tester for diagnosis. In this case, it is recommended to go to the 4S store for testing and troubleshooting. If it is a false fault code, it can be cleared directly; If it is a real fault, it needs to be repaired according to the fault code.

(Photo/Text/Photo: Pacific Auto Network Q&A called Beast)