P0004
Fuel Volume Regulator Control Circuit High
DTC P0004, sometimes indicated as P000400 is an OBD diagnostic trouble code indicating a generic fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing fuel volume regulator control circuit high.
The fuel volume regulator control circuit high (DTC P0004) is a generic OBD-II trouble code that applies to most vehicles.
What the P0004 code means
The P0004 code indicates that the fuel volume regulator control circuit is high. This could be due to a short or open circuit, or a problem with the fuel volume regulator itself.
What causes the P0004 code?
The P0004 code is most often caused by a short or open circuit in the fuel volume regulator control circuit. It can also be caused by a problem with the fuel volume regulator itself.
What are the symptoms of the P0004 code?
The most common symptom of the P0004 code is an illuminated check engine light. You may also experience poor engine performance, a lack of power, or a rough idle.
How does a mechanic diagnose the P0004 code?
To diagnose the P0004 code, a mechanic will use a scan tool to read the code and then inspect the fuel volume regulator control circuit for shorts or open circuits. They may also test the fuel volume regulator for proper function.
- P0004: Fuel Volume Regulator Control Circuit High
- P0004: Fuel volume regulator control – circuit high
- P0004 00: Fuel volume regulator control - circuit high