P0B04 - OBD Trouble Code

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The trouble code P0B04 can be explicated as Auxiliary Transmission Fluid Pump Motor Phase V Current Low. 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 make to another. This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code

The brighter you are, the more you have to learn! That’s why we are here to provide you more knowledge about the P0B04 trouble code. It is the engine control module which would examine the auxiliary transmission fluid pump motor. This trouble code would be set by the ECM when the auxiliary transmission fluid pump motor signal would not be as per the parameters set by the manufacturer.

What causes this problem with the Auxiliary Transmission Fluid Pump Motor Phase V Current Low?

• Auxiliary transmission fluid pump might be flawed
• Auxiliary transmission fluid pump harness is not shut or tiny
• There might be poor electrical connection in the auxiliary transmission fluid pump circuit 

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2. Powertrain Control Module - There can be some issues with the Powertrain Control Module due to which you may see P0B04 code appearing over and over again. Visit us to buy best quality PCM online.
3. Exhaust System Parts - Are you facing some faults in your Exhaust System Parts? Don’t worry and get them replaced or else P0B04 code can turn up.
4. Transmission Fluid Pump - Common cause behind this P0B04 error code can be some fault in Transmission Fluid Pump. So it will be a good decision to replace them now.
5. Automatic Transmission Fluid - Transmission Fluid Pump is perfectly fine but still but having that trouble code P0B04 flashing? In such a situation your Automatic Transmission Fluid might be faulty. Why don’t you think of getting that replaced?
6. Engine Control Module - The P0B04 code can also arise due to some issues in Engine Control Module. So it is advised to replace them as soon as possible.

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 P0B04 here:

Common Symptoms:

• Illumination in the service engine soon light

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 P0B04:

• The malfunctioning auxiliary transmission fluid pump harness should be repaired or replaced as per the need
• Carefully adjust the faults in the auxiliary transmission fluid pump 
• Recondition the non-functioning auxiliary transmission fluid pump circuit
• It is necessary to perform proper service of the unsound powertrain control module

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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:

• 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.
• After performing a careful inspection, every of the stored codes and freeze frame data are retrieved as it can help down the way for further diagnosis process.
• Most often he has to inspect the solenoid itself to see if they are faulty or damaged. Additional error codes that are stored in the vehicle are also addressed.
• The mechanic performs a continuity test between the PCM and solenoid to check the resistance.
• If the solenoid or the control modules are not faulty, he will then retune the code and test drive the vehicle.
• On test driving, if the P0B04 code does not return soon, he will know that an erratic condition exits.
• But if the error returns instantaneously, he will check every components of the control module as well as the circuit like connectors, wires, harness, fuses etc for any possible fault.
• If any component is damaged, he will fix them right away.
• After performing this repair, he will inspect the transmission fluid as well as its level.
• If the level is below the manufacturer’s specification, it has to be refilled and if the fluid is murky or contaminated it needs to be replaced.
• Every time a repair work is carried out, make sure that the mechanic test drives the vehicle after every repair so that the diagnosis is successful. This can eventually help him to know as to where the error occurred.

Common Mistakes When Diagnosing The P0B04 Code

• Common mistakes while diagnosing this trouble code are unnecessary and expensive replacements which usually happen when one don’t follow all the steps carefully. In this code usually people replace auxiliary transmission fluid pump motor without even properly diagnosing it.
• The most common mistake while diagnosing this code is missing out on diagnosing steps which further leads to the expensive and unnecessary replacements. It is always recommended to seek help of experienced diagnostician to avoid any mistakes