P0033 OBD Error Code: Problem & Solutions

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Is your vehicle’s Turbocharger Bypass Valve Control Circuit giving you tough time? The turbocharger bypass valve control circuit turns intermittent when it faces obd error code P0033. Your vehicle’s Check Engine Light also known as CEL will start flashing when it faces this error code.

Let’s have a deeper look into this problem with your vehicle’s turbocharger in the subsequent sections.

OBD error code P0033 indicates that there is some problem with the bypass system of the turbocharger/supercharger to relieve pressure completely or partially. This obd error code P0033 has a different definition for different manufacturers depending upon their particular system.

However, some common causes behind this problem can be highlighted as follows:

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

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

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Have you ever wondered why is it so important to know the symptoms of the problem? Well, it is extremely essential to know the symptoms of the problem in order to detect it. Keeping this in mind, let’s throw some light on few common symptoms of OBD error code P0033

Common Symptoms

• Fall in the engine performance
• Flashing of the Check Engine Light
• Bypass Valve Control Circuit being intermittent and failing to perform
• Jerking during acceleration
• Beyond normal smoke from the exhaust
• Spark plug failure
• Increase in engine and transmission temperature

After knowing the causes and the symptoms of the problem, next thing on your list should be to get rid of that problem, or in other words to correct that problem. Now, how will you solve this issue with your Turbocharger bypass control circuit? Well it’s simple. All you need to do is to follow the following steps

• Firstly, 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.
• Next, 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.
• In case 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).
• In case you find that the pressure is in the normal range, then pressure sensor is faulty and needs to be replaced.

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Wish to diagnose the issues your vehicle is facing? Well if you wish to check whether your vehicle is facing obd error code P0033 or not, you will need to follow these simple steps

• Get a mechanic to verify the code with the help of an OBD-II scanner
• Conduct a boost pressure test on the basis of the manufacturer. Check whether boost pressure sensor is within the manufacturer’s range of not.

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 P0033 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.