P0004 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0004 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P0004 code.

What Does P0004 Code Mean?

OBD-II Code P0004 is defined as a Fuel Volume Regulator Control Circuit High

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.

P0004 Symptoms

• Decreased engine performance
• Engine may stall
• Increased fuel consumption

Common Problems That Trigger the P0004 Code

• Fuel volume regulator failure
• Powertrain Control Module (PCM) failure
• Wiring issue

Common Repairs Needed for the P0004 Code

• Fuel Pump Replacement