Inpa Error 159 • Quick & Quick

In BMW diagnostic tools, INPA Error 159 (often listed as EDIABAS Error 159: NET-0009: TIMEOUT

Step 3: Refresh Driver Latency (FTDI/CH340)

1. Open Device Manager > Ports (COM & LPT).
2. Right-click your USB Serial Port (e.g., "USB Serial Port COM5").
3. Go to Properties > Port Settings > Advanced.
4. Change "Latency Timer" from 16 to 1 millisecond (lowest possible).
5. Change "Receive Buffer" to 512.
6. Click OK, then restart your computer.

Step 1: The Physical Check (Car Side)

• Turn the ignition ON. Not accessory. The dash lights must be on.
• Check Fuse: Find your OBD-II fuse (Look for "Diagnostic" or "Cigarette Lighter" – often fuse 16 or 34 on E46/E39). Replace it.
• Check Battery Voltage: If your car battery is below 11.5v, modules will drop offline. Use a charger.

Ignition Signal Missing: The software does not "see" that the car is on. Many cheap K+DCAN cables lack a bridge between pins 7 and 8, or the "Battery" and "Ignition" dots in INPA remain white (off) even when connected. inpa error 159

In INPA (BMW diagnostic software), is a common communication timeout error. It typically signals that the software is trying to talk to the car but isn't getting a response within the expected timeframe. Why Error 159 Happens Poor Connection In BMW diagnostic tools, INPA Error 159 (often

• Bits per second: 9600 (for K-Line) or 500000 (for CAN).
• Advanced: Ensure COM port is 1–16 (INPA prefers COM1–COM4).