Error Code P0004: What It Means & What To Do?

<<See All OBD Codes

OBD Code P0004 is elucidated as a Fuel Volume Regulator Control Circuit High. The excessive amount of fuel is released from the fuel system from the engine back to the fuel tank with the help of a fuel volume regulator. If the fuel volume regulator is not sending back the correct voltage signal, then the P0004 code would appear.

The P0004 code is analogous with the electrical circuit. It connects to our fuel system and is generally found in diesel engines. The other codes which might be related to it are P0006 and P0007. It is a generic OBD-II Code which indicates and issue with the engine control module which is not able to read signals.

What causes this problem with the Fuel Volume Regulator Control Circuit High?

• There can be some sort of corrosion in the sensor connector
• A broken wire to the Electronic Control Module
• Defects in the fuel shutoff valve
• Damaged ECM
• Some faults in the FVCV circuit
• Problem with the PCM

1. Engine Control Module - OBD Code P0004 can flash if the engine control module is damaged. You must replace it with a brand new one online with us.
2. Powertrain Control Module - Is your ECU perfectly correct, but still seeing P0004 code? Then there is definitely some issue with the powertrain control module.
3. Fuel Volume Control Valve - Did your mechanic just found out that there is some fault in the fuel volume control valve circuit? Buy top notch FVCV from us at economical prices.
4. Engine Wiring Connectors - A broken engine wiring connector can cause a lot of issues. It would be nice if you get it replaced on time.
5. Fuel Volume Regulator - Everything is fine with the engine control module and still OBD code P0004 flashing? Then there is definitely some fault with the fuel volume regulator. Get it checked and replace if needed.

You might be thinking that how would you diagnose these problems? We at Parts Avatar Canada would help you diagnose the major symptoms easily. The P0004 would start producing a check engine light on the dash and would likely cause:

Common Symptoms

The P0004 code will produce a Check Engine Light on the instrument panel/dash and will likely cause:

• When the key is turned off, even then your engine will continue running
• The engine won’t be able to start because it cannot build fuel pressure
• You can face possible stalling while driving

It is very important to fix the fault code P0004. So here are some ways with which you can correct this issue:

• Professional scan tool should be connected to check the code exists
• Research should be performed from the professional sources for testing and values based upon the code
• There can be some other faults code which to the issue which should be checked carefully
• You should clear the fault codes to see which fault codes return
• Scan tool data should be used to analyse from the ECM
• Road test the vehicle while analysing the scan tool data from the ECM with other tools attached
• Confirm if the P0004 code returns or the symptoms exist
• Examine all of the items listed above (wiring, voltages, etc.)
• If the fuel shutoff valve, wiring, or anything else is faulty, then it should be replaced

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range of camshaft, wastegate actuator, engine crankshaft and a lot more. We are sure that now all your issues would be resolved.

Have a look at multiple tools which the diagnosis may require:

• The first and foremost task is to do diagnosis by visually inspecting all wiring and connectors
• Look if there are some shorted or burned wirings and then you must replace circuitry and connectors as per the requirement
• If the system wiring, connectors, and components appear to be in normal working order, connect the scanner to the diagnostic connector and record all stored trouble codes and freeze frame data
• You can easily diagnose the conditions which have helped to this code with the help of this information
• Now once the codes are fully cleared up, carefully operate your car to check if the code returns or not
• There are chances that if you may have an intermittent condition that the code would fail to return
• It is very important to test the sensor voltage as per your vehicle make and model specifications
• You must test your fuel volume control regulator by checking resistance after it has been unplugged from the PCM harness
• Replace the Powertrain Control Module only after checking that the code actually exists and after exhausting all other possibilities

Common Mistakes When Diagnosing The P0004 Code

If you are thinking that by replacing your car’s fuel pressure shutoff valve would surely give you a successful repair, then you are wrong. At the same time, it can be very expensive as well as would indulge a lot of labour. A number of components in the electrical system are responsible for it. There is no need to replace the fuel shutoff valve at the initial phase. You must always start by visually inspecting as well as testing it with some special equipment. An advanced scan tool as well as a voltmeter is needed to evaluate the electrical signals. This would tell you that fuel shutoff valve requires replacement or there might be some problem which exists.