Fault code P0006 – fuel shutoff valve “A” control circuit low

Fault code P0006 is called “Fuel Shutoff Valve “A” Control Circuit Low” but in different programs it may be called differently. This fault designation applies to all vehicles equipped with OBD-II.

Technical description and explained code P0006

This Diagnostic Trouble Code (DTC) is a generic powertrain code. Error P0006 is considered a general code because it applies to all makes and models of vehicles. Although the specific repair steps may vary slightly depending on the model.

Fault code P0006 – fuel shutoff valve

The fuel shutoff solenoid valve is used to shut off the fuel supply to the fuel pump. When the ignition is off, the spring-loaded plunger is in the down position, blocking the fuel supply to the pump.

When the starter is turned on, the solenoid is energized by the trip relay. The plunger then moves to the up position, allowing fuel to flow to the pump.

When the ignition switch is released and the engine is running, low current is applied to the other winding of the solenoid to keep it in the up position.

Code P0006 indicates a low signal level in the fuel cutoff valve control circuit “A” and indicates a problem with the cutoff solenoid or its circuit. That is, a low circuit signal means that a component or sensor in the system is lacking the normal voltage necessary for it to operate.

The reasons for a low circuit signal are many and varied, but in most cases this type of code is caused by wiring problems or poor connection of electrical connectors. But do not rule out many other problems preventing current from flowing through the wiring.

Symptoms of vehicle malfunctions

The main signal that an error P0006 has occurred is the Malfunction Indicator Lamp (MIL) is also known as the CheckEngine Light.

It can also be warning signs such as:

  1. Check engine control lamp on the control panel will light up (the code will be recorded in the memory as a fault).
  2. Inability to start the car engine.
  3. Floating revolutions, as well as attempts to stall at idle.
  4. Loss of engine power.
  5. Increased fuel consumption.

The severity level of error P0006 is quite high, therefore it is recommended to eliminate the problem as soon as possible. Since its occurrence may cause problems with engine start-up.

Factors that can cause this error code

The error code P0006 can mean that one or more of the following problems have occurred:

  • Faulty fuel cutoff solenoid valve.
  • Fuel shutoff solenoid valve relay is defective.
  • Problem with electrical wiring or harness.
  • Faulty ignition switch.
  • Clogged fuel lines.
  • Sometimes faulty PCM module is the cause.

How to fix or reset OBD-2 code P0006

Some suggested steps for troubleshooting and fix the error code P0006:

  1. Clear the error codes from the vehicle’s computer memory.
  2. Test-drive the vehicle to find out if code P0006 appears again.
  3. Perform a visual inspection and repair or replace damaged electrical wiring if necessary.
  4. Diagnose and, if necessary, replace the fuel cutoff solenoid valve.
  5. Check for blockages in the fuel system, and check the ignition switch for proper operation.
  6. If there is a problem with the PCM, reprogram or replace the control module.

Diagnose and repair of problems

You should start the diagnosis of error P0006 by retrieving all stored codes and stop frame data of the vehicle. Write this information down, as it may come in handy later. Then clear the codes and perform a test drive to see if the code has reset.

Visually inspect all system components, wiring and fuel lines. Make sure the fuel lines are not kinked or pinched, make repairs if necessary.

Check fuel cutoff valve wiring

There are usually two or three wires to the fuel shutoff solenoid: pull, hold, and ground. Refer to your vehicle’s repair manual to determine which wire is responsible for what.

Disconnect the fuel shutoff solenoid connector and hold one end of the test lamp to the pull wire pin. Connect the test lamp clamp to the negative battery terminal. After starting the engine, the control lamp should light up.

Next, check the “hold” connector of the power supply circuit. Power should be supplied through this part of the circuit only when the key is in the “work” position. To do this, hold one end of the test lamp to the “hold” pin of the wire. Connect the test lamp clamp to the negative battery terminal and the test lamp should illuminate.

Check the grounding by placing one end of the test lamp to the contact and the other end to the positive terminal of the battery. The test lamp should illuminate.

If the wire check shows a fault, the fault should be corrected.

Checking relays

If the fuel shut off solenoid is not energized, the relay should be checked. The easiest way to do this is to swap the relay for a different one.

Usually the same relay is used on more than one circuit, allowing you to replace it. If the fuel cutoff solenoid works, the relay was most likely defective.

If the required relay is not available, you can use a jumper wire to test it. Connect the jumper wire between the battery and the fuel cutoff solenoid. If the solenoid works, then the relay is defective and must be replaced to clear error P0006.

On which vehicles does this problem occur most frequently

Fault code P0006 can occur on different vehicles but there are statistics on which brands this occurs most often. Here is a list of some of them:

  • Citroen (C4)
  • Dodge
  • Ford
  • Nissan
  • Peugeot (206, 307, 308, 407)
  • Volkswagen (Transporter)
  • GAZelle (Business)

Fault code P0006 can sometimes be found with other errors. The most common are the following: P0005, P0007.

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