Auto Zone will check your engine light codes for FREE...
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
It requires a scanner to properly diagnosis a check engine light.
you check the system for trouble codes.
The check engine light has nothing to do with the washer fluid. If the check engine light is on you need to have it checked for codes with a scanner.
To check engine light codes one would have to bring your vehicle to a mechanic who can use a computer to check the computer chip that regulates this function.
I clear the check engine light with a Scangauge II. But most ODB-II devices can read and clear the code.
May have to change oil.
Auto Zone will check your engine light for free... Write down the codes and go from there.
If you mean the 'Check Engine' light it's on the instrument cluster on the left side near the engine coolant guage.