Plug your cable back in and note which COM port appears (e.g., COM1, COM2). Right-click the cable device and select . Go to the Port Settings tab and click Advanced .
Follow these troubleshooting steps in order. Most users find that step one or step two resolves the issue completely. Step 1: Change the USB Latency Timer (Most Common Fix)
Windows often turns off USB ports to save power, killing your diagnostic session mid-communication.
The standard Windows USB settings are too slow for the rapid data exchange INPA requires.
When this error strikes, it abruptly halts your diagnostic session, blocking your ability to read fault codes, view live data, or register new components. Below is a comprehensive guide to understanding what causes INPA Error 159 and the exact step-by-step methods required to resolve it. What is INPA Error 159? inpa error 159
refers to a network-related issue where the EDIABAS engine has sent a command to the vehicle but has not received a response within the expected timeframe.
Do not panic. (also known as IFH-0009) is one of the most common, yet solvable, errors in the BMW diagnostics world. This 3,000-word guide will explain exactly what this error means, why it happens, and the 11 proven ways to fix it.
When INPA or an integrated virtual machine launcher triggers Error 159, it means . This is fundamentally a connection bottleneck. It is rarely a problem with the vehicle's modules themselves; instead, it is an issue with the link between your laptop, your OBD interface cable, and the vehicle. Technical Root Causes
Error 159: API function unsuccessful Error in API call. Task not possible. Plug your cable back in and note which COM port appears (e
To resolve INPA Error 159, try the following:
This error indicates a disruption in communication between your PC, the diagnostic cable (K+DCAN), and the vehicle's electronic control units (ECUs). When this error appears, the program stops, preventing you from reading fault codes, coding new modules, or accessing live data.
: INPA typically requires the cable to be assigned to COM1 in the Windows Device Manager.
These models utilize high-speed D-CAN signaling. Physical Pin 7 and Pin 8 must be completely separated . Bridging them on a D-CAN car shorts out the network bus and blocks communication. Follow these troubleshooting steps in order
The USB serial port settings in Windows default to a transmission delay that is too slow for BMW factory diagnostics.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.
Move the switch to join Pins 7 and 8 . Older ECUs split diagnostic data across both pins.