Right-click the Windows Start button and select .
Some ECUs will not communicate unless the car key is turned to position 2 (ON) or the engine is running.
A weak or drained battery can disrupt communication between INPA and your vehicle’s control units. Users have reported that after jump-starting a car with a depleted battery, diagnostic errors disappeared once the battery was sufficiently charged. The diagnostic bus requires stable voltage to function properly.
Are the solid black when you open INPA? Share public link inpa error 159
Yes, it happens. The OBD port requires 12v power on Pin 16. If your car's cigarette lighter fuse is blown (often shared on E46), the OBD port has no power. No power = No communication = Error 159.
INPA error 159 is a communication timeout that halts diagnostics dead in their tracks. The vast majority of cases are solved by correctly setting the and the Latency to 1ms in your Windows Device Manager. For more stubborn cases, check your firewall, your EDIABAS.INI settings, or consider the advanced solutions outlined above. By working through the steps in this guide, you will systematically identify the root cause and restore your connection to your BMW's inner workings.
This is the single most common fix for Error 159. Right-click the Windows Start button and select
If you are out at your car and need a rapid fix, run through this mental checklist:
The EDIABAS.ini file is pointing to the wrong interface type.
Understanding why this timeout occurs is the first step toward a permanent fix. The most common culprits include: Users have reported that after jump-starting a car
Always plug the cable into the exact same USB port on your laptop. Plugging it into a different port causes Windows to assign a new COM port, breaking your settings. Conclusion
BMW INPA (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).