Inpa Error 159 Jun 2026

: The most frequent culprit. Your COM port latency must be set to 1ms .

A major cause of Error 159 is hardware mismatch, such as when pins 7 and 8 on a K+DCAN cable are not bridged for older models (pre-2007) Bimmerforums.com The Feature:

Check your system tray and Task Manager for programs that may be holding COM1:

For remote configurations (such as using a GT1 Yellow Head or working across a network), an incorrect RemoteHost IP address or port number can also trigger Error 159. inpa error 159

If you own a BMW or work in a shop that services them, you've likely heard of – a powerful diagnostic tool that gives you dealer-level access to your car's electronics. But with great power comes great frustration when something goes wrong. One of the most common and infuriating hurdles is the INPA error 159 .

If the result shows Error 159 , EDIABAS cannot talk to the interface at all—check your COM port driver. If it passes, the issue is with the car’s specific ECU.

Navigate to C:\EDIABAS\BIN\ and open with Notepad. Check the following parameters: : The most frequent culprit

If you want, tell me the car model/year, adapter type, and whether 159 appears for all modules or specific ones — I’ll give targeted next steps.

For INPA to communicate reliably, the USB-to-Serial latency must be set to 1ms. Open on your PC.

If error persists, reinstall EDIABAS/INPA and make sure no other software (like ISTA or Rheingold) is blocking the COM port. If you own a BMW or work in

Try reading a different control unit. If you can read the Engine Control Module (DME/DDE) but get Error 159 when trying to read the Airbag (MRS) or Transmission (EGS) module, your software setup is fine. The issue is likely a localized physical problem, such as a blown fuse powering that specific module or a broken wire on the car's K-line bus. Beware of Cheap Cable Clones

(same menu)

: Ensure the software detects "Battery: ON" and "Ignition: ON." If these dots aren't black, the interface isn't seeing the car, leading to a timeout. Cable Switch

Users of DIS (BMW’s Dealer Diagnosis System) or GT1 diagnostic heads may encounter a related error: .