P0004 OBD-II: Fuel Volume Regulator Control Circuit High
P0004 Severity
Should you fix P0004 yourself?
Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.
Proper diagnosis will save you time and money on unnecessary repairs.
Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.
What causes OBD-II fault code P0004?
The Fuel Volume Regulator allows the fuel system to release excessive fuel from the engine back to the fuel tank. When the engine control module (PCM) determines that the Fuel Volume Regulator is not sending back the proper voltage signal, the PCM will set code P0004.
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