P06B3 - OBD Trouble Code

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The trouble code P06B3 can be elucidated as Sensor Power Supply "B" Circuit/Open. There are a lot of OBD-II sensors which are activated by a voltage signal that is provided by the powertrain control module or one of the other on-board controllers. The degree of voltage applied which is known as reference voltage might differ between very low voltage (typically measured in millivolts) up to full battery voltage. The most common sensor voltage signal is 5-volts; followed closely by battery voltage. Obviously, you might need to decide exactly which sensor is associated to this code. A reliable source of automobile information will yield this information.

This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle to another. The sensor power supply "B" circuit is being monitored by the engine control module. This trouble code would be set by the ECM when the sensor power supply "B" circuit would not be as per the specifications set by the manufacturer.

What causes this problem with the Sensor Power Supply "B" Circuit/Open?

• Malfunctioning engine, transmission, or transfer case sensor
• Wiring and/or connectors or grounds might be unlocked
• The fuse or fusible link might be blown
• Malfunctioning PCM or a PCM programming error

1. Automatic Transmission Module - If the transmission module is faulty, then the vehicle might experience erratic gear shifts and throttle response. The engine might also stall will be accelerating and slowing down. Thus, replace faulty automatic transmission module, if required.
2. Engine Wiring Harness - Most of the time, a particular component doesn’t work properly due to faulty wiring and connectors. These need to be replaced immediately as it can easily solve any OBD code problem. Buy and replace faulty engine wiring harness today!
3. Engine Control Module - Dead cells in batteries can cause a failure in the engine control module. Many times, a battery is left in the rig long after a cell has died. This would affect the grounding in the car battery.
4. Powertrain Control Module - If there are some faults in the PCM, then it may throw off the timing and fuel settings of the engine, which can negatively affect the performance. A flawed PCM may cause the vehicle to experience a reduction in fuel efficiency, power as well as acceleration.
5. Electronic Control Unit - Do you know that the poor performance or unexplained drops in fuel economy or efficiency are often associated to onboard car computer problems, or defective ECU issues?
6. Diagnostic Tools - Use factory grade diagnostic tools to resolve OBD code P06B3 error. Buy new diagnostic tools and equipment for us.

You might be thinking that how would you diagnose these problems? We at Parts Avatar Canada would help you diagnose the major symptoms easily.

Common Symptoms

• Visibility in the check engine light
• The transfer case might be out of order
• Issues related to no-start condition of the car engine
• Reduced fuel efficiency
• The car engine might hang back
• Variable transmission
• There might be harsh transmission

Looking out for some ways with the help of which you can correct this fault code? Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:

• Repair or replace the quirky engine, transmission, or transfer case sensor
• Rehabilitate the defaults in the PCM or a PCM programming error
• Carefully adjust the faults in the wiring and/or connectors or grounds
• The fuse or fusible link should be restored to working order

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Here are some steps which you should follow in order to diagnose this fault code:

After verifying the P06B3 code with an OBD-II scanner, the mechanic should begin with a visual inspection of all electrical components. It is essential to consult your vehicle information source for technical service bulletins (TSB) that replicate the code stored, vehicle (year, make, model, and engine), and symptoms exhibited. If you find the appropriate TSB, it may yield helpful diagnostic information. You will require a diagnostic scanner and a digital volt/ohmmeter to accurately diagnose a code P06B3. A reliable source of vehicle information will also be required. Begin by connecting the scanner to the vehicle diagnostic port and retrieving all stored codes and freeze frame data. You will want to write this information down, just in case the code proves to be an intermittent one. After recording all pertinent information, you should clear the codes and test drive the vehicle until the code is reset or the PCM enters readiness mode. If the PCM enters readiness mode, the code is intermittent and will be even more difficult to diagnose. The condition, which caused the P06B3 to be stored, may need to worsen before an accurate diagnosis can be reached. On the other hand, if the code fails to reset and there are no drivability symptoms exhibited, the vehicle can be operated normally. If the P06B3 is immediately reset, proceed with a visual inspection of system related wiring and connectors. You can always utilize your source of vehicle information to obtain connector face views, connector pin-out charts, component locators, wiring diagrams, and diagnostic flow charts associated to the code as well as automobile. Now if there is no storage of any other codes and the P06B3 error continues to reset, then you should use the DVOM to check the controller power supply fuses and relays. Make sure to restore the blown fuses, relays, and fusible links as per the requirement. Fuses should always be examined with the circuit loaded to avoid a misdiagnosis. You might suspect a faulty controller or a controller programming error if all controller power (input) and ground circuits are intact and there is no sensor power (output) supply voltage being output from the powertrain control module (or other controller). Just keep in mind that the controller replacement might need reprogramming. Reprogrammed controllers might be available through aftermarket sources for some applications; other automobiles/controllers will need on-board reprogramming that might only be done through a dealership or some other qualified source.

Common Mistakes When Diagnosing The P06B3 Code

• Some issues related to the powertrain control module
• Issues with the car wiring