OBD II Codes (P0000 - P0099) | P0007 “Fuel Shutoff Valve Control Circuit High”

Meaning:

P0007 is a generic OBD-II code indicating an issue with the engine control module (ECM) not receiving correct signals from your fuel shutoff valve. The fuel shutoff valve is located at the fuel supply rail mounted to your engine.
The ECM uses the fuel shutoff valve to prevent fuel from entering the engine when you turn it off. By doing this, the valve prevents your engine from continuing to run after you turn the key off (a term we call “dieseling”). The code will possibly cause dieseling or prevent the engine from starting. The Check Engine Light will also turn on.

causes:

The Fuel Shutoff Valve "A" Control Low code may have several causes:

• Fault in the fuel shut off solenoid circuit
• Malfunctioning PCM
• A faulty fuel shut off solenoid relay
• A problem with the PCM
• Possible damage to the valve’s connector
• A broken wire going to the ECM
• A defective fuel shutoff valve
• The ECM is damaged internally

Symptoms:

Here are the common symptoms you should watch for that may be related to this trouble code:

• Check engine light is on
• Decreased engine performance
• Stalling
• Decreased fuel economy
• Engine won’t start

The P0007 fault code may cause your vehicle to have:

Effect caused:

• Lower fuel economy
• Inability to start
• Dieseling issues (not turning off)
• Stalling issues at any time while driving
• Inability to pass emissions testing

Diagnosis:

P0007 is properly diagnosed with an advanced scan tool capable of factory sensor readings (not just one from your local auto parts store) and a voltage meter. A qualified technician can read the data from the advanced scan tool to determine when and where the problem occurred or if it is still occurring. They may clear the code from the ECM and test drive the vehicle while monitoring the scan tool data to see if the fault returns or is constant.
Connectors and wiring may have to be inspected for damage which may require cutting open the protective covering, inspecting the wiring harness, repairing the problem, and replacing the covering.
Based upon the conditions of the testing, possible clearing of the code(s), and a road test while monitoring the data, further diagnosis may be required. Diagnosis will require multiple tools such as:

• Lower fuel economy
• Inability to start
• Dieseling issues (not turning off)
• Stalling issues at any time while driving
• Inability to pass emissions testing

Solution:

The most common procedure to repair the P0007 code is as follows:

• Clear the code
This code is often set in error. The first thing to do is clear the code, drive the vehicle and see if it returns. If it does not, the problem is solved.
Perform a visual inspection of the shut off solenoid and connector
Many problems can easily be found in the harness and connectors. So, begin your diagnosis by visually inspecting the solenoid and its connection.
• Check solenoid operation
Consult the vehicle repair manual to determine which pin on solenoid connector is the power “pull” wire and which is ground. Then, remove the solenoid and check for proper operation by jumping it. This can be done by attaching jumper wires to the battery or by using a Power Probe. The plunger should pull up when power is applied. If it does not, the solenoid is faulty and should be replaced.
• Check the circuit
If the fuel shut off solenoid checks out OK, but you still have P0007 code illuminated, you’ll need to check the circuit.
The fuel shut off solenoid should have two or three wires going to it: pull, hold and ground. Consult the repair manual for your vehicle to determine which wire is which.
Disconnect the fuel shut off solenoid connector and touch one end of a test light to the “pull” wire pin. Connect the test light clamp to the battery negative post. Crank the engine; the test light should illuminate. If it does not, there is problem in the power supply, and you will need to consult the factory wiring diagram.
Next, check the “hold” side of the power circuit. Power should only be supplied through this portion of the circuit when the key is in the run position. With the engine running, check for power at the “hold” pin of the fuel shut off solenoid connector. To do this, touch one end of a test light to the “hold” wire pin. Connect the test light clamp to the battery negative post; the test light should illuminate. If it does not, there is problem in the power supply, and you will need to consult the factory wiring diagram.
To check for ground, disconnect the solenoid connector and touch one end of a test light to the B- pin. Connect the test light clamp to the battery positive post. The test light should illuminate. If it does not, there is problem in the ground circuit, and you will need to consult the factory wiring diagram.
• Check the relay
If power is not getting to the fuel shut off solenoid, you’ll want to check the relay. The easiest way to do this is by swapping the relay with another under the hood. Usually the same relay design will be used on multiple circuits, making the swap possible. If the fuel shut off solenoid works with the alternate relay installed, you know the original relay was bad.
If you are unable to swap relays you can use a jumper wire to test the relay. Connect a jumper wire or paperclip between the battery feed to the fuel shut off solenoid and power. If the solenoid works, the relay is defective.