Can Check Engine Light Turn Itself Off?
Why Does The Check Engine Light Turn Itself Off?
Why The Mechanic Isn’t Able To See The Issue
Sometimes the mechanics are not able to tell you what your issues is. What Audi and Volkswagen do, after 40 passes of the same test, both the light is off and the error code is gone. After your car performs 40 tests and they all pass, the mechanic could run diagnostics but he won’t be able to see any errors.
Can I Diagnose The Problem Myself?
Yes, you can do that. But, in order to do that, you will need an OBD scanner. ( you can grab one here on amazon). You will have to connect this scanner to the cars main computer which is pretty easy. This type of scanner is connected to your mobile phone and you will receive the error codes on your mobile phone.
Here are some of the most common error codes that you will get:
- Oxygen Sensor Code: P0171-P0175. This error code appears when you have a faulty oxygen sensor. This sensor monitors the amount of oxygen in the exhaust and gives this information back to your engine computer so it knows how to adjust the fuel mixture.
- Engine Misfire Code: P0300-P0305. This is a very common issue as well. This happens when one or more cylinders are not functioning properly. The mechanics work on these issues on a daily basis. The OBD Scanner is able to diagnose this issue without a problem.
- Evaporative System Code: P0411, P0440, P0442, P0446, P0455. The EVAP has a mission to contain and remove vapors that are created when fuel is burned. Even a loose gas gap that allows the vapors to escape from the fuel tank can trigger this failure code.
- Exhaust Gas Recirculation Code: P0401. The EGR controls the emission of smog from the engine. This could be if you don’t change your engine oil on time or you drive your car on a short trips without warming it up which will cause carbon buildup.
- Catalytic Converter Code: P0420, P0430. This device converts the toxic gases into less toxic pollutants. This is a very important part in the vehicle, but will eventually become worn out and will have to be changed.
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