P004D OBD Error Code: Problem & Solutions

<<See All OBD Codes

Did your mechanic just tell you that there are some issues with the powertrain control module as it is not able to receive signals from the boost control solenoid? Or is he saying that the signals which the boost pressure sensor is giving are not as per the factory settings? Then there are chances that OBD Error Code P004D mat start triggering.

The air is forced into the engine to increase its overall power with the help of turbocharger and superchargers. There is a nozzle vane in the turbocharger which keeps on opening and closing so that it can control the amount of exhaust gas flowing. This controls the boost pressure. If the vane is moving towards the closing direction, then the pressure would increase and vice versa.

What causes this problem with the Turbo/Supercharger Boost Control B Circuit High?

Potential causes for this code to appear are:

• Faults in the boost pressure/ turbocharger position sensor
• Damaged turbocharger/supercharger
• Defects in the control solenoid
• Problems with the car wiring
• Faulty PCM
• Vacuum leaks if the valve is vacuum controlled

1. Turbocharger/supercharger - Are there some faults in your turbocharger/supercharger? Don’t waste time and get them replaced or else P004D code can turn up.
2. Turbocharger position sensor - OBD Code P004D can appear because of faulty boost pressure/ turbocharger position sensor.
3. Boost control solenoid - Everything is fine with turbocharger/supercharger and still P004D code triggering? Then you must get your boost control solenoid checked.
4. Powertrain Control Module - There can be some issues with the PCM due to which you may see P004D code appearing over and over again. Visit us to buy best quality PCM online.

It is vital 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 P004D here:

Common Symptoms

• You might experience an illumination with the Check Engine Light
• Vehicle boost is over or under factory specifications
• The driver may experience lack of engine power
• Rising fuel consumption
• Uncommon noises coming from the engine bay
• Black smoke coming out of the exhaust pipes

We have listed out some ways which would help you to correct the occurrence of OBD Code P004D. They are mentioned here as follows:

• The vacuum leaks can be troublesome, you must fasten them.
• If the air filter is dirty replace it
• Make sure to replace wastegate
• Replace intercooler
• Make sure the connections on the intake and exhaust side of the turbo are airtight
• Replace boost sensor
• If the turbocharger/supercharger is damaged, then you must replace it
• Repair or replace bad wiring in the circuit
• Replace Powertrain Control Module

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of PCM, Solenoid, Supercharger and many more. Now all your problems would vanish within no time.

Have a look at the procedure which would help you to easily diagnose the P004D error code. The main reason behind the flashing up of this code is that the PCM is not receiving signals from the boost control solenoid. The other reason can be that the signal provided from the boost pressure sensor may not be as per the factory specifications. The first and foremost thing which should be done is to check the circuit by testing the power as well as ground at the solenoid. Then you must carefully check the turbocharger/supercharger by removing the intake to check if there is any sort of damage or debris.

If you find any sort of debris, then the best option would be to replace the unit. Then the pressure sensor should be tested. There must be three wires going through the position sensor: power, ground and signal. The control solenoid should also be tested properly checking its internal resistance with an ohmmeter.