What is OBD-II Code P00D7 – Turbocharger/Supercharger Bypass Valve A Temperature Too High

What is OBD-II Code P00D7 – Turbocharger/Supercharger Bypass Valve A Temperature Too High

As a mechanic, I often come across OBD-II codes that can indicate different types of problems with the car’s engine. One of the more common codes that I have come across is P00D7, which refers to “Turbocharger/Supercharger Bypass Valve A Temperature Too High.” This code typically indicates a problem with the bypass valve of the car’s forced induction system, which can lead to reduced engine power, reduced fuel efficiency, and increased emissions. In this article, I will explain what this code means, the causes of the problem, and the steps that I take to repair it.

What is OBD-II?

OBD-II, or On-Board Diagnostics II, is a system that is used in modern cars to monitor and control different functions of the engine. The system uses various sensors and computers to keep track of the car’s performance and alert the driver when there is a problem. An OBD-II system can monitor a variety of parameters, including engine speed, temperature, fuel efficiency, and emissions. If the system detects a problem, it will store a fault code in its memory, which can be read by a diagnostic scanner.

What is a turbocharger/supercharger bypass valve?

Turbochargers and superchargers are devices that are used to increase the performance of the engine by increasing the amount of air that is supplied to the engine. They work by compressing the air that enters the engine, which increases the amount of oxygen that is available for combustion. However, at high engine speeds, the pressure in the intake system can become too high, which can cause the compressor to become less efficient and can reduce the engine’s power output. To prevent this from happening, many turbochargers and superchargers are equipped with a bypass valve that allows air to bypass the compressor at high engine speeds. This valve is controlled by a computer that uses various sensors to determine when to open the valve.

What does the P00D7 code mean?

The P00D7 code is a generic powertrain code that is used by most OBD-II systems to indicate a problem with the turbocharger/supercharger bypass valve. Specifically, the code indicates that the temperature of the bypass valve has exceeded the threshold set by the car’s computer. This can indicate a variety of problems, including a malfunctioning valve, a wiring problem, or a problem with the computer itself.

What are the symptoms of a P00D7 code?

A P00D7 code can cause a variety of symptoms, depending on the severity of the problem. Some common symptoms include:

– Reduced power output: If the bypass valve is not working properly, the engine may not be able to produce as much power as it should.

– Reduced fuel efficiency: A malfunctioning bypass valve can cause the engine to consume more fuel than necessary, leading to reduced fuel efficiency.

– Increased emissions: If the engine is not running efficiently, it may produce more emissions than it should.

– Check engine light: The P00D7 code will usually trigger the check engine light to come on, indicating that there is a problem.

What are the causes of a P00D7 code?

There are several possible causes of a P00D7 code, including:

– Malfunctioning bypass valve: The most common cause of this code is a malfunctioning bypass valve. Over time, the valve can become stuck or can fail completely, causing the engine to run inefficiently.

– Wiring problem: The wiring that connects the bypass valve to the computer can become damaged or corroded over time, which can cause the valve to malfunction.

– Computer problem: In some cases, the problem may be caused by a malfunctioning computer that is not properly controlling the bypass valve.

How do you repair a P00D7 code?

The first step in repairing a P00D7 code is to diagnose the problem. This typically involves using a diagnostic scanner to read the fault code and identify the cause of the problem. Once the cause of the problem has been identified, the next step is to repair or replace the faulty component. If the problem is caused by a malfunctioning bypass valve, it will need to be replaced. If the problem is caused by a wiring problem or computer problem, these will need to be repaired. In some cases, it may be necessary to replace the entire forced induction system if the damage is too severe. After the repair has been made, the diagnostic scanner can be used to clear the fault code and reset the check engine light.


1. What happens if I ignore a P00D7 code?

Ignoring a P00D7 code can lead to reduced engine power, reduced fuel efficiency, and increased emissions. In addition, it can cause damage to other components of the engine over time, which can be expensive to repair.

2. Can I drive my car with a P00D7 code?

You can technically drive your car with a P00D7 code, but it is not recommended. It is best to have the problem diagnosed and repaired as soon as possible to prevent further damage to the engine.

3. How much does it cost to repair a P00D7 code?

The cost of repairing a P00D7 code can vary depending on the cause of the problem and the extent of the damage. In general, the repair can cost anywhere from a few hundred dollars to several thousand dollars.

4. Can I fix a P00D7 code myself?

Fixing a P00D7 code typically requires specialized knowledge and tools, so it is not recommended for the average person to attempt to fix the problem themselves. It is best to take the car to a qualified mechanic for diagnosis and repair.

5. How can I prevent a P00D7 code from occurring?

One way to prevent a P00D7 code from occurring is to perform regular maintenance on your car’s forced induction system. This can include replacing the air filter, checking the hoses for leaks, and cleaning the compressor blades. It is also important to avoid overloading the engine, as this can put extra strain on the forced induction system.

In conclusion, the P00D7 code is a common problem with forced induction systems. It typically indicates a problem with the bypass valve, which can lead to reduced engine power and increased emissions. If you see this code on your dashboard, it is important to have your car diagnosed and repaired as soon as possible to prevent further damage to the engine. By performing regular maintenance and taking care of your car’s engine, you can help prevent problems like this from occurring in the first place.

Scroll to Top