Do OBD2 Tuning Chips Drain Battery if Left Plugged In While the Car is Off? Can They Be Left Plugged In 24/7?

When it comes to modern vehicles and aftermarket modifications, OBD2 tuning chips are a topic of debate. Some argue that these devices can significantly improve engine performance, while others claim that they can be detrimental to your car's health and, in particular, its battery. With numerous dubious products available, it's crucial to approach the use of OBD2 tuning chips with caution. In this article, we'll explore the potential impact of these chips on your battery and discuss whether they can be left plugged in 24/7 without causing harm.

Understanding the Risks

Many people, including automotive experts, warn against the use of OBD2 tuning chips, including those labeled as "scams." There are legitimate concerns about the potential risks associated with these chips. For instance, they are not designed to be plugged in 24/7 and could potentially cause damage to your car's computer systems. The primary concern revolves around the risk of a parasitic draw, which can significantly drain your battery.

The Parasitic Draw Test

The easiest way to determine if an OBD2 tuning chip is causing a parasitic draw and battery drain is through a simple test. This test is known as a parasitic draw test, and it involves the following steps:

Remove the OBD2 tuning chip from your car.

Perform the parasitic draw test with an ammeter connected in series with the disconnected negative battery cable. This test will help you measure the current flow while the car is off.

Compare the readings with and without the OBD2 tuning chip. If the current draw increases significantly after reconnecting the chip, it indicates a parasitic draw issue.

Why You Should Be Cautious

Although the OBD2 port is designed to accommodate diagnostic scan tools, it is not intended for long-term use of performance tuning chips. By plugging in a chip 24/7, you run the risk of:

Overheating the chip, which can lead to malfunction and potential battery drain.

Causing a parasitic draw, which drains your car's battery when the vehicle is off.

Short-circuiting the main computer, which can result in irreversible damage to your car's electronic systems.

The Verdict

Based on the evidence and the experiences of many car owners, it's highly recommended to avoid leaving an OBD2 tuning chip plugged in 24/7. Instead, use the chip for troubleshooting and tuning during your car's operation. This will help minimize the risk of battery drain and any potential damage to your car's systems.

Conclusion

While OBD2 tuning chips may offer performance benefits, it's crucial to be cautious when using them. Remember, the OBD2 port is not a place for long-term performance modifications. By understanding the risks and conducting a parasitic draw test, you can make informed decisions and ensure the longevity of your car's battery and electronic systems.