P06B5 OBD Error Code: Problem & Solutions

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The trouble code P06B5 can be described as Sensor Power Supply "B" Circuit High. 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 diagnostic fault code is a generic powertrain code, which means that it would apply to the OBD-II equipped vehicles. The specific repair steps can vary as it depends upon the vehicle make and model. This would also give rise to the illumination of the check engine light.

Error code P06B5 flashing? Keep on reading further to know more about this error code. When the P06B5 trouble code would be stored in an OBD-II equipped vehicle, then it would mean that the powertrain control module has failed to detect power supply voltage for a specific sensor or group of sensors. It totally depends upon the manufacturer that the sensor might be associated to the exhaust gas recirculation system, the heated exhaust oxygen sensor system, the automatic transmission, or the transfer case (four-wheel drive or all-wheel drive vehicles only). The sensor circuit which is affected has been given the designation A (A & B may be interchanged as well).

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

• There can be distorted engine, transmission, or transfer case sensor
• Wiring and/or connectors or grounds are open or small
• Blown out fuse or fusible link
• Broken PCM

1. Electronic Control Unit - ECU monitors the temperature differences in the boost converter with the help of the temperature sensors to prevent the converter from overheating and malfunctioning. Thus, replace faulty ECU immediately.
2. Engine Control Module - ECM failures and faults can be very difficult to find and resolve as these are very rare and might require a complete reprogramming of the system to avoid wrong codes from getting stored in the system, leading to misdiagnosis. Replace it now!
3. Automatic Transmission Module - Sometimes the transmission module is unable to communicate or correctly anticipate the speed of the vehicle and thus creates difficulty in gear shift leading to sluggish acceleration, throttle response and stalling. Thus, can also hamper a lot of components physically and thus must be checked and replaced, if required.
4. Engine Wiring Harness - Is your car battery losing charge very quickly as well as frequently? Then it is an indication that your car engine wiring harness has some major issues. Get it inspected and replaced as soon as possible.
5. Powertrain Control Module - Faulty PCM can disrupt the normal functioning of the vehicle by affecting the transmission system and the fuel delivery system. This will cause the system to store wrong OBD error and thus can lead to misdiagnosis.
6. Diagnostic Tool - In order to be that DIY guy, you need few diagnostic tools to get your car problems pointed out easily. Our diagnostic tools collection will come in handy to do so, so why not have a look?

We care for our customers and that’s why we can totally understand your problem. That’s the reason why we have listed out some major symptoms behind the flashing up of OBD Code P06B5. They are mentioned here as follows:

Common Symptoms

• Check engine light can start flashing up
• The transfer case might not be functional
• Issues related to no-start condition of the car engine
• The fuel efficiency might drop off
• The car engine might start hesitating
• Irregular transmission
• There can be grating transmission

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 P06B5:

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

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Do you wish to diagnose P06B5 error code easily? Here are some steps which you should follow in order to diagnose this fault code:

The mechanic or the technician will use a diagnostic scanner or code reader like DVOM to visually scan for the error codes in the vehicle. 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 P06B5. 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 P06B5 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 P06B5 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 P06B5 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 P06B5 Code

• The powertrain control module might start failing
• Some issues with the car wiring