Error Code P06B0: What It Means & What To Do?

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The trouble code P06B0 can be explicated as Sensor Power Supply "A" Circuit/Open. When the P06B0 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).

It is the engine control module which would examine the sensor power supply "A" circuit. This trouble code would be set by the ECM when the sensor power supply "A" circuit would not be as per the parameters set by the manufacturer.

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

• Imperfect engine, transmission, or transfer case sensor
• Issue of unbolted wiring and/or connectors or grounds
• The fuse or fusible link might be blown out
• Faulty PCM or a PCM programming error 

1. Engine Wiring Harness - The broken wires in the wiring harness might lead to some serious engine problems. So make sure that you replace your faulty engine wiring harness to avoid such a situation.
2. Engine Control Module - The solenoid might cause a short in the engine control module because of corrosion in the solenoid or the wire running from the solenoid to the ECM harness.
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. Electronic Control Unit - The ECU power management control module keeps in check the hybrid battery charging functions. If the ECU is faulty, the battery pack will not be able to properly get charged and thus, the ECU might need replacement.
5. Powertrain Control Module - A trouble with the PCM would mean that it is unable to determine the right fuel mixture and would send the car engine either more or less fuel than it requires. Now when the engine gets more, the carbon emission would increase and fuel economy would drop. In case of the opposite, the engine will choke, stutter, and might start stalling sometimes.
6. Diagnostic Tool - Usually any OBD code problem requires deep insight into the problem and high grade tools in order to fix it properly. Thus, buy quality diagnostic tools form us!

It is essential to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P06B0 here:

Common Symptoms

• Illumination in the service engine soon light
• Transfer case might not be working properly
• Engine no-start condition
• Diminished fuel efficiency
• Engine hesitation, sag, miss, or stumble
• Serious engine drivability issues
• Transmission may shift inconsistently
• Transmission grating 

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 P06B0:

• You must fix the defective engine, transmission, or transfer case sensor
• Make sure to mend the faulty wiring and/or connectors or grounds
• It is essential to restore the flawed fuse or fusible link
• Carefully adjust the faults in the PCM or a PCM programming error 

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If you want to easily diagnose this trouble code, then you must follow the steps which are mentioned here as below:

• Use an OBD-II scanner in order to verify that the code is present, and check for other codes for any other type of error or problem that might need attention.
• 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 P06B0. 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 P06B0 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 P06B0 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 with the code as well as automobile.
• Now if there is no storage of any other codes and the P06B0 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 P06B0 Code

• PCM related issues
• Issues related with the car wiring