P0004 Code Definition
P0004 Fuel Volume Regulator 'A' Control Circuit High
What Does the Engine Code P0004 Mean?
Character "P" in the first position of Diagnostic Trouble Code (DTC) represents the powertrain system (engine and transmission), "0" in the second position means that this is a generic OBD-II (OBD2) DTC. "0" in the third character position in a DTC indicates that the fuel and air metering and auxiliary emission controls is experiencing a malfunction. The last two characters "04" is DTC number. OBD2 Diagnostic Trouble Code P0004 means that Fuel Volume Regulator 'A' Control Circuit High has been detected.
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How Serious Is the Code P0004?
For now, this issue is not serious. Carly recommends you to check this issue on a regular basis and check if it gets worse later on.
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