How to deal with the fault of engine exhaust system

Troubleshooting of engine exhaust system: Turn off the engine for three consecutive times after restarting the car, or unplug the negative electrode of the engine battery and wait for 30 seconds before connecting it. This method can effectively solve the engine false fault.

1, poor gasoline quality, poor oil products and substandard fuel may lead to abnormal mixing ratio, electronic equipment failure and abnormal exhaust system.

Solution: Clean the fuel tank in time, replace qualified gasoline and go to a regular gas station to refuel.

2. Electronic components of the air intake system are faulty, such as oxygen sensor damage, three-way catalytic device damage, carbon canister electromagnetic valve damage, throttle carbon deposit, engine carbon deposit, etc.

Solution: Go to the repair shop to clean up the carbon deposit and replace the damaged electronic components such as the air intake system.

3. The control program of the engine has not been updated or debugged, resulting in engine emission failure.

Solution: the owner only needs to go to the repair shop to update or debug.

4. Once the engine fault light is on, it means that the parameters of the engine will change, which may be due to poor atomization of the fuel injector or circuit fault. For example, the spark plug, ignition coil and cylinder line are not working.

Solution: If this problem is not solved in time, the engine combustion state will never be adjusted to the normal state. Need to go to the repair shop for repair.

5. The poor quality of urea pump and urea solution in diesel engine will lead to engine emission failure.

Solution: Check whether the urea pump of diesel engine works and whether the nozzle is blocked by crystallization. If it crystallizes, it is necessary to increase the exhaust pipe temperature or urea.

6. If the vehicle can't start after the fault light is on, it is usually caused by the fault of the fuel pump or ignition device.

Solution: If you can continue to drive, but the vehicle has symptoms such as severe jitter and weak acceleration, it is recommended to stop driving and call a trailer to a nearby repair shop for repair.