P0004 - Fuel Volume Regulator Control Circuit High
The P0004 is an OBDII generic code, but almost none of the vehicle manufactures use it. If you are getting this code, make sure you are using the correct OBDII code scanner for your vehicle's make and model.
- Engine Light ON (or Service Engine Soon Warning Light)
Fuel Volume Regulator Control Circuit High is the generic definition for the P0004; however your vehicle's manufacturer may have a different definition for the P0004 code.