The Windows COM port latency is often set too high (default is usually 16ms), causing the software to "time out" before the car responds.
Do not randomly reinstall software. Follow this logical, step-by-step process.
This error is most common on using the K-Line (single-wire diagnostics). Specifically:
: Go to Ports (COM & LPT), select your cable, and ensure it is set to COM1 . Under Advanced settings, set the Latency Timer to 1 .
This is the culprit 90% of the time. Your INPA installation has old ECU definition files (Daten), but your BMW has newer or older module software. inpa error 159
Click to save, exit Device Manager, and restart your computer. 2. Align EDIABAS Configuration Files
Right-click on (where X is your port number) and select Properties .
But if you see: [IFH-0010] ... – That means a short circuit on the K-Line. [IFH-0003] ... – That means incorrect baud rate (9600 vs 115200). Go back to latency settings.
For standard K+DCAN USB cables, ensure it reads exactly: Interface = STD:OBD Save the file and close it. 4. Ensure Correct Ignition Sequence The Windows COM port latency is often set
After fixing Error 159, you should be able to:
If you still get Error 159 on (e.g., airbag works but ABS fails), you simply need to update DATEN files for that specific ECU type (e.g., DSC MK60).
Ensure your vehicle's key is turned to . The dashboard lights should be illuminated.
This fixes the “No response” variant of Error 159. This error is most common on using the
If it lists a different port, change it to match your Device Manager setting, then save the file. Step 3: Verify the K-Line / D-CAN Bridge Switch
INPA Error 159 is rarely an indicator of broken car hardware. Instead, it is a classic digital "miscommunication" resulting from tight timing parameters. By changing your and optimizing your EDIABAS buffer settings , you can clear the bottleneck, restore stable data flow, and successfully read your BMW's modules.
BMW’s K-Line is a shared data wire. Many modules (DME, EGS, ABS, Airbag, IKE) all talk on the same green wire (Pin 7 on the OBD2 port). If one module is faulty, crashed, or stuck in a "high" state, it holds the K-Line high (12v), preventing any other module from communicating. INPA tries to wake up the DME, but the dead module is screaming over it. Result: Error 159.
