Inpa Error 159 [top]
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Disconnect your cable from the car, but . Press Win + X and select Device Manager . Expand the Ports (COM & LPT) dropdown tree.
Below is an overview of the causes and solutions for this error:
If you have exhausted all software troubleshooting steps and Error 159 persists, the problem may be hardware-related:
Registered the battery using Tool32 ( steuern_batterie job). Restarted INPA. Error resolved. inpa error 159
Loose OBD-II port connections or faulty USB ports on your laptop.
It is a common oversight to attempt diagnostics with the key merely inserted or in accessory mode (Position 1). Insert the key/fob.
The aftermarket adapter had no bridge between pin 17 (Battery+) and pin 20 (Ignition). The DME stayed in sleep mode.
At its core, INPA Error 159 indicates a fundamental breakdown in communication between your computer’s EDIABAS software layer and the diagnostic hardware connected to your BMW. Several distinct issues can trigger this timeout: If you found this guide helpful, bookmark it
If you get Error 159, flip the switch to the opposite side and try connecting again. 5. Check Physical Connections and Vehicle Voltage
Depending on the production month of your BMW, your cable configuration must adapt to bypass data timeouts:
Right-click the device and select , then go to the Port Settings tab. Click Advanced . Change the COM Port Number to COM1 .
The breakdown in communication can occur at several points along the chain. The most frequent culprits include: Press Win + X and select Device Manager
Your K+DCAN cable has a built-in switch (or requires internal bridging) to toggle between pin layouts for different model years.
Cheap aftermarket K+DCAN cables often feature substandard internal microcontrollers (such as counterfeit FTDI chips). These clone chips overheat rapidly or fail to process high-speed byte streams, dropping packets mid-request and mimicking an ECU timeout error. If the error happens intermittently after a few minutes of smooth operation, the cable hardware itself is likely failing under load.
Many K+DCAN cables feature a small on the plastic housing.
