OBD II Codes (P0000 - P0099) | P0005 “Fuel Shutoff Valve Control Circuit / Open”:
Meaning:
: P0005 is a generic type of diagnostic trouble code which indicates that the Engine Control Module (ECM) detects a problem with the fuel pump shut off solenoid. This code is rarely seen as it does not pertain to any make or model of vehicle.
The fuel pump shut off solenoid is an electromagnetic switch that allows or blocks the passage of fuel from the fuel pump to the engine, according to the position of the ignition switch. When the ignition switch is turned with the ignition key, a signal is sent to the fuel pump shut off solenoid, which protrudes or retracts a shaft that starts or stops the flow of fuel to the engine accordingly. The shaft pops out within the fuel passage to block the flow of fuel if the ignition is off, or the switch is defective.
causes:
• Faulty fuel shutoff valve relay
• Powertrain Control Module (PCM) failure
• Circuit issues, such as damaged wiring or poor connections
• A faulty fuel pump shut off solenoid
• Clogged fuel lines
• A faulty ECM
• A faulty ignition switches
P0005 is a generic code, so it can have several triggers. Here are the most common causes:
symptoms:
• Vehicle will not start
• Poor engine performance
• Stalling engine
• Check engine light on
Diagnosis:
• Tests the ignition switch and fuel pump shut off solenoid with a multimeter to ensure they have the proper ground, voltage reference, and resistance levels
• Compares the results of these tests to the specifications of the manufacturer
• Inspects the wires and terminals of the Engine Control Module for corrosion and fraying
• Checks the fuel pump pressure
SOLUTION
• 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 (http://www.powerprobe.com/IV/). 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 P0005 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.