KT200 ECU Programmer FAQs: Connection Driver Error Solution

When you use KT200/KTM200 to perform ECU maintenance chip tuning, DTC code removal on BOSCH, MAGNETI MARELLI, CONTINENTAL, Denso, DELCO, TEMIC or SIEMENS by bench, boot, BDM/JTAG and OBD mode, you’d better install KT200 software V22.08.20 on Win10 32/64bit with Intel i5, 5th generation above and 8GB above RAM, disable anti-virus program before installing software, must connect to internet for operation and keep the network stable. Otherwise, it may fail to install or use with some issues. Check the related problems and solutions.

Common problems:

  • Software cannot connect to the server
  • Computer time zone problem
  • Diagnosedetect problem
  • dll file errorproblem
  • Driver problem

1.Software cannot connect to the server problem

Problem: After connect KT200 device, click on “CONNECT”, it says “WAIT INTERNET CONNECTION” but it has not been connected.  Error!!! Send Log File to support.


Disable Windows Defender.

Take the computer WIN10 system as an example

Go to Windows Settings>> Virus and Threat Protection

Check whether anti-virus protection software is installed, and then close and delete the anti-virus software

If have, go to Windows Settings>> Firewall and network protection to turn off network firewall

And check if Windows Defender Firewall is turned off synchronously.

Make sure you have closed the firewall and anti-virus system software, reopen KT200, and connect to the server.

2.Computer time zone problem

Problem 1: If the time zone is inconsistent with the current location, KT200 will display an error ‘Computer clock is wrong’.


In the computer settings, search for “time”, select the corresponding time zone, and synchronize the network time.

Problem 2: Close the application and correct your time


If the software takes too long to open, time will not be synchronized.

Just close the application and correct date/time of your PC

Restart the KT200 software

3.Diagnosedetect problem

Solution: There are three files Gcheck.dll, SecurityAccess.dll, wuzi.dll in the KT200-master folder, the suffix dll files cannot exceed three letters, and the extra ones can be deleted.


4.dfb2xx.dll file error problem

Problem: Use Diagnose to detect, displays an error ‘Wrong size or version of C/windows/syswow64/dfb2xx.dll’


The reason is that the size of the dfb2xx.dll file in C:\windows\syswow64 is inconsistent. The size of the dfb2xx.dll file of KT200 is 202kb, not 392kb, so replace it.

5.Driver problem

Problem 1: The driver is missing, and appears the error message ‘Cannot load file libcrypto-3.dll Error: 126’


Install the patch package corresponding to the operating system, and it can run normally

The 32-bit system corresponds to the X86 version, and the 64-bit system corresponds to the X64 version.


If your current KTM200 software is V22.804, recommend you to install the KT200 software V22.08.20 which has resolved the problem that the mobile network cannot connect to the server, added the boot screen to solve the long-term unresponsiveness of the click software and optimized the virtual data read and write functions.

Learn more:

KT200 Master Full Version: https://www.uobdii.com/wholesale/kt200-ecu-programmer-master-full-version.html
KT200 Basic Version: https://www.uobdii.com/wholesale/kt200-ecu-programmer-auto-version.html