Troubleshooting INPA Error 159 (NET-0009: TIMEOUT) INPA Error 159 is a common communication fault defined in the EDIABAS environment as NET-0009: TIMEOUT. This error signifies that the diagnostic software sent a request to the vehicle's hardware, but did not receive a response within the allotted timeframe. Primary Causes & Solutions
The following factors are the most frequent triggers for Error 159, ranging from hardware physical connection issues to software configuration conflicts. 1. Hardware Connection Issues
Loose Interface: Often seen with VXDIAG or VCX SE devices; the physical connection to the OBDII port or the PC's USB/Ethernet port is not secure.
Defective Cable: Low-quality or damaged K+DCAN cables are a frequent cause. Testing with a known working cable (such as those from BimmerGeeks) can confirm if the hardware is at fault.
Incorrect Cable Settings: For newer BMWs (built after 03/2007), a K+DCAN cable is required. Some cables have a physical switch that must be toggled to the correct position for the specific vehicle chassis. 2. Network and EDIABAS Configuration DIS - Fault 200 159 - Bimmerforums - The Ultimate BMW Forum
BMW INPA Error 159 (formally IFH-0009: No Response From Control Unit) is a common communication breakdown between the diagnostic software and the vehicle's electronic control units (ECUs).
Below is an overview of the causes and solutions for this error: Common Causes
Hardware Conflicts: The most frequent cause is a physical issue with the K+DCAN cable. Many aftermarket cables require pins 7 and 8 to be bridged (soldered) for older BMW models (pre-2007) or unbridged for newer ones. inpa error 159
Incorrect COM Port Settings: INPA typically requires the cable to be assigned to COM1 in the Windows Device Manager.
Latency Issues: For stable communication, the COM port latency timer must be set to 1ms.
Software Configuration: Errors in the EDIABAS.ini file, such as an incorrect interface setting (e.g., set to STD:ADS instead of STD:OBD), will block the connection. Troubleshooting Checklist
Check Hardware: Ensure the cable's LED is active. If your car is pre-2007, check if you need a K+DCAN switch cable to bridge pins 7 and 8.
Verify Device Manager: Go to Ports (COM & LPT), select your cable, and ensure it is set to COM1. Under Advanced settings, set the Latency Timer to 1.
Run OBD Setup: Navigate to C:\Ediabas\Hardware\OBD and run obdsetup.exe to ensure registry entries are correct.
Check EDIABAS.ini: Open the file in C:\Ediabas\Bin\ and verify that Interface = STD:OBD is correctly set. Bottom line: Error 159 is frustrating but fixable
Ignition Status: Ensure the car's ignition is fully ON (all dash lights lit), as many modules will not respond in accessory mode.
For users still experiencing issues after these steps, it is often recommended to use the BimmerGeeks Standard Tools package, which is pre-configured to avoid common installation errors. INPA Error "IFH0009: No Control From Response Unit"
| If you see… | The fix is… |
|-------------|--------------|
| Error 159: Program version incorrect | Update DATEN files for that chassis |
| Error 159: Identification error | Use F3 menu to pick exact ECU script |
| IFH-0009 + Error 159 | Latency timer to 1ms + check cable termination switch (set to “Auto” or “K-Line”) |
Bottom line: Error 159 is frustrating but fixable. It’s INPA’s way of saying, “I see a computer, but I don’t speak its firmware language.” Update your DATEN, match your script, and you’ll be back to coding in 15 minutes.
Have a different error code? Mention it in the comments—include your BMW model, year, and INPA version.
USB introduces latency and voltage issues. If you have an older laptop with a physical RS-232 port, buy a native RS-232 to K-Line interface (e.g., ADS interface). These do not buffer data, so Error 159 never appears on K-Line vehicles.
Error 159 is not model-specific, but it is interface-specific. It plagues: E36, E39, E46 (K-Line, round diagnostic port under
It rarely appears on newer F-series or G-series cars using ENET or ICOM interfaces.
BMW diagnostic interfaces use FTDI or CH340 chipsets. Windows default USB polling rates are too slow (16ms). When INPA requests a multi-frame response (e.g., reading 20 fault codes), the buffer overflows. The API job is canceled because the result is incomplete.
Chinesium K+DCAN cables are a blessing and a curse.
Symptoms: INPA reads chassis VIN, but clicking on "DME MS S54" gives Error 159 instantly.
Root Cause: The aftermarket adapter had no bridge between pin 17 (Battery+) and pin 20 (Ignition). The DME stayed in sleep mode.
Solution: Opened the adapter and soldered a jumper wire between pin 17 and pin 20. Error 159 gone.
On E36 and early E39, the K-Line has a pull-up resistor inside the DME that can weaken over time. Solder a 1N4148 diode (anode to pin 7 of OBD connector, cathode to your USB interface's K-line input). This prevents back-voltage from corrupting the job result.
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.
(Invoking related search term suggestions.)