P0039 - OBD Trouble Code

<<See All OBD Codes

Are you experiencing a significant reduction in engine performance accompanied by fouling of spark plugs? Is your vehicle exhaust system emitting excessive smoke? If your answer is YES, then chances are that your vehicle is set to OBD error code P0039. Now, you must be wondering what is this P0039 code? What does it mean? Well to get your answers to all the questions you will need to go through our subsequent sections.

OBD error code P0039 has different definitions for different vehicles. P0039 error code generally means that your vehicle is facing some problems with turbocharger or supercharger bypass valve control circuit. It is either relieves pressure completely or partially.

If your vehicle is set to OBD error code P0039, it means that the boost pressure is out of range on boost pressure (normally 9 psi to 14 psi). The issue can be caused by several common causes listed as follows:

What causes this problem with the Turbocharger Bypass Valve Control Circuit?

• Issues such as cracks or disconnected vacuum line
• Corroded or disconnected electrical connectors
• Failure of wastegate solenoid
• Some wiring issues with the turbocharger
• Boost controller failure
• Problems with Powertrain Control Module, also known as PCM
• Issues with turbocharger bypass valve and actuator

1. Engine Control Module - We have in stock high end engine control modules (ECM) and powertrain control modules for all make and models for you. So, what are you waiting for? Make the best parts yours today.
2. Turbocharger Or Supercharger - if you need to fix obd error code P0039, you might need top quality turbochargers and superchargers which you can easily find with us at best possible prices.
3. Engine Wirings & Connectors - We also have in stock high end engine wirings and connectors for all makes and models. So, don’t waste time and get your hand on our best range of electrical parts today.
4. Diagnostic Tools - In order to be that ideal DIY guy, you will need perfect DIY diagnostic tools. Where can you find them? Nowhere else than PartsAvatar.
5. Boost Control Solenoid - If you need Boost control module to fix this problem, all you need to do is to browse through our website. You can find the most budget friendly boost solenoids with us.
6. Spark Plugs - Looking for top quality Spark plugs for your vehicle? If YES, you can find them with us for all makes and models.

Knowing the symptoms of a problem is highly important if you wish to diagnose the problem. So, keeping in mind the extreme need to know the symptoms we have listed out few common symptoms related to OBD error code P0039.

Common Symptoms

• Reduction in the engine performance
• Check Engine Light will flicker or flash
• Weird hissing noises from the turbocharger or supercharger
• Bypass Valve Control Circuit being intermittent and failing to perform
• Jerking during acceleration
• Beyond normal smoke from the exhaust
• Spark plug fouling
• There might be cylinder detonation, caused by hotter engine temps

Rise in engine and transmission temperature higher than normal

Since, we already know the causes and the symptoms of the problem, next thing on our list should be to get rid of that problem, or in other words to correct that problem. Now, the question is how will you do so? Well it’s simple. All you need to do is to follow the following steps

First of all, we suggest you to get a certified technician to verify the code with a scanner after resetting the fault codes and performing a road test.

Secondly, what you will need to do is to perform a pressure test on the intakes system between the turbocharger/supercharger and intake throttle valve. This will help you to check if the pressure is low or high against the manufacturer’s specifications.

Now if the pressure is low, you will need to check for cracks or damage in the intake hoses, intercooler, pipes and clamps. If you find them to be in best condition then check the bypass valve to determine if it is open (slightly or completely) allowing boost pressure to escape.

In case the pressure is high, we recommend you to check the bypass valve to make sure that it opens under the maximum boost pressure (as per manufacturer’s specifications).

Also, if you find that the pressure is in the normal range, then pressure sensor is faulty and needs to be replaced.

Additional notes

If you experience this problem a several number of times, chances are that there might be a crack in the lower parts of an intake hose (normally visible). It develops cracks because the dirt and the fluids collect in the lowest part of the intake system near the radiator or such hot engine components causing hose brittle and have a 1-2” crack.

Now in order to correct these damaged parts you will definitely need new parts that are genuine and of high quality. Right? You can easily find them with us at PartsAvatar. So, what are you waiting for? Grab your dream parts today with us.

We have not only the top brands but also have them at the best prices. So, you know what does this mean? This means that you will get the best of the both worlds - Best prices and best quality.

If you want to or really wish to diagnose the issues your vehicle is facing, you will need to follow certain instructions. And if you wish to check whether your vehicle is facing obd error code P0039 or not, you will need to follow these simple steps

• Firstly, get a mechanic to verify the code with the help of an OBD-II scanner
• Next, conduct a boost pressure test on the basis of the manufacturer. Check whether boost pressure sensor is within the manufacturer’s range of not.
• If you discover that the pressure is high, you will need to conduct an inspection of the bypass valve. In case the pressure is low, there are chances of a leak in the intake system that needs inspection.

Also, you need to remember that the bypass valve is operated differently depending on the manufacturers. Some are spring operated especially the Asian models.

Common Mistakes When Diagnosing The P0039 Code

Common mistake that you are likely to commit while diagnosing this error code is that of assuming that the basic components are operating as normal. Often the problem is just because of a loose clamp causing a loss of pressure. But you might end up replacing other parts like turbocharger, if not properly diagnosed.