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OBD2 memory saver

OBD2 Memory Saver: How does it work?

In this article, we’ll talk about an OBD2 memory saver – what is it and why do you need one. But first, do remember losing all your saved car settings when you unplug your battery for that simple maintenance work? Radio stations, engine fault codes, sensor settings, and even the time on your clock – all gone!

Now, you have to enter these settings again, or worse, pay someone to do it for you. 

car battery

Avoid all these by having a battery memory saver so the next time you unplug your car battery replacement, it will save you from an unwelcome inconvenience and unexpected expenses.

How does an OBD2 memory saver work?

Assuming you own an OBD2-fitted vehicle, it should have an engine control unit (ECU) – the car’s computer. The ECU, sensors, and other car devices need electricity to work. Thus, when you remove your battery, the whole system shuts down, triggering a master reset and setting all settings to default.

OBD2 memory saver

An OBD2 memory saver is a device that keeps the power supply flowing temporarily as you remove the car battery. To use it, you need to plug the device into the car’s OBD2 port and connect the other end (i.e. the alligator clips) to a power source. This can be a spare 12V car battery or a regulated DC power supply

Once you’re done with your repair or maintenance, just return the battery and unplug the OBD2 memory saver. And you’re done! Plus, your clock, saved stations, and settings remain as they were.  

Some reminders

  • You may find other OBD2 memory savers that connect to the cigarette lighter instead of the OBD2 port. This works as well, but on some vehicles, the port automatically shuts off after 30 minutes or so. 
  • Other battery memory savers ask you to connect a 12V battery or regulated DC power supply to the car’s jump post. 
  • Test any memory saver tool before removing the battery. Most have an LED bulb and make sure it turns on. 
  • Avoid having the alligator clips touch each other while the device is plugged in to avoid short circuits or blowing a fuse.
  • Be sure to check with your car’s service/repair manual on how to do the battery replacement. You may find the tools you will need and maybe the recommended memory saving device to use.
Alligator clips
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