Guide To P2666 OBD Error Code Solutions

<<See All OBD Codes

The trouble code P2666 can be defined as Fuel Shutoff Valve “B” Control Circuit Low. The fuel shutoff valve “B” control circuit is being monitored by the engine control module. This trouble code would be set by the ECM when the fuel shutoff valve “B” control circuit would not be as per the specifications set by the manufacturer.

It is a generic code which is related to the problem with the engine control module which is not able to receive the right signals from the fuel shut off valve. This valve is present at the fuel supply rail which is mounted to your car engine. The fuel is prevented from entering the car engine when we turn it off with the help of engine control module. The valve would now prevent the car engine from continuing to run after the key has been turned off. The appearance of this code would cause dieseling and would also prevent the car engine from getting started. This would also turn on the check engine light. The engine control module, powertrain control module or the transmission control module monitors this circuit depending upon the particular automobile. The P2666 error code identifies an issue with the fuel shutoff valve.

What causes this problem with the Fuel Shutoff Valve “B” Control Circuit Low?

• Malfunctioning fuel shutoff valve 'B'
• Fuel shutoff valve 'B' harness might be open or little
• Substandard electrical connection in the fuel shutoff valve 'B' circuit
• Malfunctioning powertrain control module

1. Engine Control Module - It is not always the components, but the ECM that can also be faulty. It can cause misinterpretation of correct data thus leading to wrong operational decisions which will affect the transmission and overall engine performance. Thus, replace faulty module and reprogram it now!
2. Powertrain Control Module - Powertrain Control Module can also be faulty in rare cases and thus needs through checks for system and software errors. Thus check and replace it, if required.
3. Fuel Injector - The fuel injectors are an important component of the fuel delivery system that helps in proper utilization of the fuel entering the engine. This not only helps in taking care of the air to fuel ratio in the engine, helping the combustion process but also enhances the performance. Thus, replace faulty injector now!
4. Electronic Control Unit - The ECU manages the cooling system to control the battery operating temperatures and thus must be replaced if found faulty. Thus, buy new ECU modules and components from us!
5. Diagnostic Tool - Make use of quality diagnostic tools to resolve any OBD error code. Buy quality diagnostic tools from us!

Willing to know some common symptoms of OBD Trouble Code P2666? Your wish is our demand. Have a look at them below:

Common Symptoms

• Visibility in the check engine light
• Diminishing engine performance
• Rise in the fuel consumption
• Engine might start hindering

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P2666:

• Rehabilitate the defaults in the wiring and electrical connections in and around the fuel shutoff valve circuit
• The malfunctioning fuel shutoff valve should be repaired or replaced as per the need
• Carefully adjust the faults in the fuel shutoff valve 'B' circuit
• Recondition the non-functioning fuel shutoff valve 'B' harness

There is no need to be anxious as Parts Avatar – Car Parts Online is here to help you out! We have high grade fuel shutoff valve, fuel shutoff valve connector, powertrain control module, engine control module, digital voltmeter, oscilloscope, pcm, ecm and a lot more for our precious customers.

If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

A technician begins by hooking the vehicle to an OBD-II scanner to verify that the code is present, and check for other codes. The freeze frame data along with current data is recorded, and the codes are then cleared to see if they reoccur.

Visual inspection of the wiring and connectors to check for loose connections, corrosion, or shorts is done.

A specialized tool may be used to test the wiring and electrical connections surrounding fuel shutoff valve B. Other tests of the fuel shutoff valve B and its components may help pinpoint the problem, as well as inspection of the wiring and connectors.

Disconnect and check the resistance and signal voltage from the fuel shutoff valve B. If all the components check out, inspect for the fault in the PCM as it can sometimes store wrong OBD code and thus might need replacement or reprogramming.

Common Mistakes When Diagnosing The P2666 Code

Despite the accompanying error code, the fuel delivery problems related with problems in the fuel shutoff valve are often misdiagnosed as a problem with the fuel pump or other constituents along the fuel delivery system. Before the mechanic start replacing or repairing any components, he should make sure the P2666 code has been cleared and has not returned. If the circuit is still “open”, then the P2666 code may be the cause of the fuel delivery issues.