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- ELM327 USB driver incompatibility with Windows 8, 8.1 or 10.
Prolific PL2303 ELM327 driver incompatibility issue

ELM327 USB driver incompatibility with Windows 8, 8.1 or 10.

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Hello, and Welcome to Racext’s Car Magazine column, the column aimed exclusively at the world of 4-wheeled vehicles with news, insights and guides, available every day here racext.com, today in this article we will talk about “ELM327 USB driver incompatibility with Windows 8, 8.1 or 10.”

ELM327 USB driver incompatibility with Windows 8, 8.1 or 10.

ELM327 USB driver incompatibility with Windows 8, 8.1 or 10. - Car Magazine - Racext 1

ELM327 USB driver incompatibility with Windows 8, 8.1 or 10.

Prolific PL2303 ELM327 driver incompatibility issue

– I recently received a question regarding the ELM327 in its USB version. That person was unable to get the computer to recognize the ELM327 device, their computer has Windows 10 64-bit installed. Fortunately I have 3 computers with Windows 7 and 2 with Windows 10. I started testing on my usual computer and where I had already used these ELM327 devices without problems. To my surprise, out of 10 I have proven that none have worked. In all cases, in the Device Manager, a yellow error signal appeared on the COM port where the device was connected.

– As always I hope that Windows will give me some useful information on the problem. So he went to check the error code and cause the message. And as always, I remain the same as before reading that information. It simply informs me that a non-existent device has been specified, indicating error code 10.

– Immediately tested the same devices on the other computer running Windows 10, with the same result. After testing all the computers with Windows 7 installed and making sure they all worked perfectly, I came to the conclusion that it was due to a compatibility issue with the operating system. After searching the internet for information and reading many tips indicating downloading the latest version (to no avail), disabling some specific devices in Device Manager (to no avail) and the like, I came to the conclusion that I had to start from the very beginning .

– The first thing would be to find out which USB communication chip these ELM327 USBs incorporated. After disassembling one of them and seeing PL-2303HX written on the serial communication chip, I went to the manufacturer’s page where I found the following driver information for this chip. They indicate that it works for the PL2303 HXA, XA, HXD, EA, RA, SA, TA and TB chips, with the important caveat that it does not work for Windows 8, 8.1 and 10 for the PL-2303HXA and PL-2303X versions which are EOL (End Of Life). What it comes to mean more or less are no longer being produced and have been left to provide support in the latest driver releases.

– Since the chip inscription is PL-2303HX now I had to know if it is the HXA (without support) or the HXD version (new version that has support). In the chip itself, after that inscription another of the following style LFXXXXXA appears, where the X is a number between 0 and 9. This code identifies the revision of the chip and the last letter, A in this case, indicates that it is the PL-2303HXA chip. Only the one that was left without support for Windows 8, 8.1 and 10 in the latest driver versions.

– After checking the version I currently installed (3.8.3.0, May 28-28) and recently downloaded from the page Prolific following the countless indications in this regard …

– The possible solution was now to find an older driver that could support the PL-2303HXA. After much research I found an old version for Windows Vista (version 3.2.0.0) and which, theoretically, could support the chip version of these devices. Also in both versions, 32-bit and 64-bit. You can download them below, in the download section.

– Now it was just a matter of installing these drivers. Since the installation is a bit more complicated than installing the driver, we will explain step by step how to do it correctly.

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Driver installation PL23003 3.2.0.0

1. Download the driver and save it where we can easily locate it.
2. Disconnect the ELM327 device from the USB port, if it is connected.
3. Install the driver you just downloaded by double clicking on the file.
4. Once the installation is complete, connect the ELM327 device to a USB port and the discovery process will begin. Wait for this process to complete automatically. It is possible that Windows will inform us during this process that the installation failed, in that case don’t worry.
5. We will now open the Windows “Device Manager” where we will continue to see the same error code we had before. To fix it just change the current driver we just installed for.
6. Double clicking on it will bring up the properties window. Go to the “Driver” tab and select “Update Driver”.
7. We will see a new window with options to update it. We have to choose the one that allows us to search for it on the computer.

In the next window we will select the option that allows us to choose it from a list of the drivers available on your computer.
If everything went well now we can see the driver that was already installed and the older version and the one we need to select (version 3.2.0.0).
Finally we will check in the device properties that the driver used is now the correct one (version 3.2.0.0) and the error is no longer displayed in the Device Manager.

Final Notes

– Note that the driver must be changed in all USB ports where the ELM327 device is connected, as when connecting a device to a USB port Windows will always choose the latest driver. Which in this case is a fatal mistake. So when we change the USB port we will have to repeat the controller change from step 5.

– Finally we found more drivers than previous versions, we put them in the download area, maybe someone needs them, you never know. The ones mentioned in this article (32 and 64 bit versions) are: “PL2303 Win Vista 32 bit USB Driver” and “PL2303 Win Vista 64 bit USB Driver”.

Source and Download: HERE

Name	Cut	Date added
PL2303 USB Driver Win98_ME_2K	113.95KB	29/05/2017
PL2303 WinXP USB Driver	2.15MB	29/05/2017
PL2303 Win7 USB Driver	2.26MB	29/05/2017
PL2303 Win Vista 64 bit USB driver	1.77MB	29/05/2017
USB driver PL2303 Win Vista 32 bit	1.77MB	29/05/2017

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ELM327 USB driver incompatibility with Windows 8, 8.1 or 10.

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ELM327 USB driver incompatibility with Windows 8, 8.1 or 10.

ELM327 USB driver incompatibility with Windows 8, 8.1 or 10.

ELM327 USB driver incompatibility with Windows 8, 8.1 or 10.