It is telling you that a misfire is detected in cylinder number 4. To troubleshoot this the easiest thing to do is take the coil pack from number 4 and exchange it with number 3. Reset the light and run the vehicle. When the light comes on again see if the code is po303. If it is you have a bad coil. If it still says po304 you probably have a bad spark plug or plug boot. Good luck to you.
How do I get the code
meow
It depends on what the code is. The service engine soon, aka the check engine light, comes on when something is malfunctioning. Take it to a mechanic to find out the problem, or take it to a parts store and have them put the code scanner on it.
Trouble code P0606 means:PCM processor fault
The service engine soon on a Ford E250 can be reset by connecting an OBDII code reader to the vehicle. It allows codes to be read and reset.
Power train control module problem.
The engine computer has detected a malfunction and set a code.
on some cars, the service engine light comes and no code is present when a headlight is out
Trouble code P0775 means:Pressure control solenoid "B"
= Service Engine Soon flashing light and Trac Off light on =
engine code reader go to autozone its free tgere
The service engine soon light on the car dashboard to alert the driver to a problem with the car. A specialized computer scanner or code reader can diagnose the issue.