The P0004 trouble code pertains to the Fuel Volume Regulator Control Circuit and indicates that the circuit’s voltage is higher than the expected range. This code is commonly encountered in vehicles with electronic fuel injection systems.
Fuel Volume Regulator Control Circuit High
Code symptoms P0004.
1. Reduced fuel efficiency.
2. Poor engine performance.
3. Hard starting.
4. Illuminated “Check Engine” or “Service Engine Soon” light on the dashboard.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0004.
1. A faulty or failing fuel volume regulator.
2. Wiring or connector issues within the control circuit.
3. A malfunctioning fuel pressure sensor.
4. Fuel system abnormalities, such as leaks or clogs.
5. Problems with the Engine Control Module (ECM).
Code Solutions P0004.
1. Inspect and repair the fuel volume regulator and related wiring.
2. Test and, if necessary, replace the malfunctioning fuel pressure sensor.
3. Address and rectify any fuel system issues, such as leaks or clogs.
4. Use an OBD-II scanner to clear the trouble code from the vehicle’s memory.
5. If ECM issues are suspected, consult a qualified technician for diagnosis and potential reprogramming or replacement.