P000E Fuel Volume Regulator Control Exceeded Learning Limit
OBD-II Trouble Code Technical Description
Fuel Volume Regulator Control Exceeded Learning Limit
What does that mean?
This generic powertrain diagnostic trouble code (DTC) typically applies to many OBD-II vehicles. That may include but is not limited to vehicles from Land Rover, Ford, Alfa Romeo, Toyota, etc.
If your vehicle has stored a code P000E, it means that the powertrain control module (PCM) has detected a problem with the fuel volume regulator (fuel metering control valve).
The malfunction is related to the PCM's ability to control fuel volume to the engine. The learning limit is the degree to which the PCM is programmed to adapt in order to actuate the solenoid of the fuel volume control valve.
In my personal experience, the electronic fuel volume control system is used only on diesel engines with a common rail fuel injection system. Use caution when servicing the high-pressure fuel system.
The fuel volume regulator is composed of two parts which work in conjunction. An electronically controlled solenoid actuates an in-line valve which restricts fuel volume accordingly. In some cases, the fuel volume regulator may have an integrated fuel volume sensor as well. Other vehicle applications utilize a fuel volume sensor in the fuel supply line or fuel injector rail. A fuel return line allows excess fuel to be safely diverted back to the fuel tank when volume must be reduced.
The fuel volume regulator is typically positioned in the fuel supply line between the fuel tank and the fuel rail. It is an electronically controlled valve which is completely open during regular operation (when it is not energized). When it becomes necessary for the PCM to restrict fuel volume, the fuel volume control regulator circuit is completed using varying degrees of voltage. The valve is opened or closed according to the amount of voltage applied to the circuit.
The fuel volume sensor signal is input to the PCM which takes the necessary steps to adjust fuel volume via the regulator. If the input signal from the fuel volume sensor indicates that actual fuel volume cannot be controlled sufficiently by the PCM, a code P000E will be stored and a malfunction indicator lamp may be illuminated.
What is the severity of this DTC?
As is the case with any high-pressure fuel system related code, the P000E should be addressed with some degree of urgency.
What are some of the symptoms of the code?
Symptoms of a P000E engine code may include:
Diminished engine performance Excessive black smoke from exhaust Decreased fuel efficiency Other drivability codes may be storedWhat are some of the common causes of the code?
Causes for this code may include:
Bad fuel volume regulator control valve Fuel pump malfunction Defective fuel volume sensor Open or shorted circuits in the fuel volume control system Faulty PCM or PCM programming errorWhat are some P000E troubleshooting steps?
Tools
Tools you may need to diagnose a P000E code may include:
Diagnostic scanner Digital volt/ohmmeter (DVOM) Manual fuel pressure gauge with adapters Reliable vehicle information sourceI would typically begin my diagnosis with locating the vehicle diagnostic port and connecting the scanner. I would retrieve all stored codes and related data for use as my diagnosis unfolds. Next, I would clear the codes and test-drive the vehicle (if possible) to see which codes return (if any).
Search technical service bulletins for any which match the symptoms, stored codes, and vehicle in question. The appropriate TSB will aid you tremendously in diagnosing this code.
If the P000E is immediately reset, proceed by using the fuel pressure gauge to check fuel system pressure and measure fuel volume. Use your vehicle information source to obtain specificat
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