Q4 e-tron Error Codes Disrupt Vehicle Inspection

As an owner of a 2020 Audi e-tron 55, I encountered similar system readiness issues. The error messages typically appear when the vehicle monitoring systems have not completed their self-checks, which is crucial for passing vehicle inspections. Last month, my car experienced multiple system faults in the instrument cluster. The root cause was a faulty battery management module that prevented the OBD readiness monitors from completing their drive cycle. The solution required: 1. A complete diagnostics scan to identify affected systems 2. Replacement of the battery management module 3. Running a specific drive cycle to reset all readiness monitors 4. Final OBD verification to confirm all systems were ready This was indeed a serious issue requiring specialized attention. The car diagnostics showed multiple incomplete readiness monitors, which needed proper reset procedures. A standard computer reset alone wouldn't have solved the underlying problem. For your Q4 e-tron, recommend requesting a full system diagnostic report focusing on battery and power management systems. The check engine status and monitor readiness completion are essential for passing inspection, and incomplete monitors often indicate deeper system issues requiring attention.

Thanks for sharing your experience with the readiness monitors issue. The onboard diagnostics also caused me some headaches when my Q4 e-tron had similar error messages. After getting the battery management module replaced and running a proper drive cycle, the problems were resolved and the vehicle inspection passed without issues. Did you remember roughly how much the repair ended up costing? And has your exhaust system monitoring been working properly since the fix? Just want to make sure there werent any recurring issues that I should watch out for with mine.

Good to hear your Q4 e-tron is now working properly. Since having the system readiness check issue fixed through car diagnostics, my vehicle has performed flawlessly. The monitoring systems, including the exhaust system checks, have all been operating as intended with no recurring problems. The repair costs in my case were actually 0 Euro since the battery management module issue was covered under warranty. The only real investment was the time needed to complete the drive cycle after the repairs. Regular OBD2 diagnostics show all monitoring systems are now completing their checks properly. Its been about 6 months since the fix, and I havent seen any error messages or incomplete readiness monitors since then. The vehicle inspection process should be smooth sailing for you going forward as long as all systems maintain their ready status.

Thanks everyone for the helpful feedback. After visiting my mechanic again yesterday, I can share my full experience. The repair cost me 850 Euro since my warranty had just expired. The onboard diagnostics showed multiple incomplete readiness monitors that needed addressing. The technician found that moisture had damaged some sensors connected to the battery management system. After replacing these components and performing a complete system reset, they ran several test cycles until all monitors showed ready status. The exhaust system monitoring and other checks now work perfectly. My vehicle inspection passed smoothly this time with no error codes showing up. The whole process took about 3 days including the testing phase. While expensive, at least the problem is fully resolved and all monitoring systems are working as they should. Happy to finally have this sorted out properly.