Partner fault memory lock

Sounds like undervoltage issues I had a while back. The ECU in these vans is sensitive. If the battery voltage drops too low, even momentarily, it can trigger a fault memory lock. The fault codes you're seeing are a result of the ECU detecting the undervoltage. Have you checked your battery's health and the charging system?

When you say 'battery health', are you suggesting a simple voltage test, or is there a specific diagnostic procedure you would recommend to accurately assess the battery's condition and rule out any potential charging system malfunctions?

A simple voltage test can give you a basic idea, but ideally, you'd want a proper load test to see how the battery performs under stress. Given the 'memory lock' issue, it's likely related to undervoltage. It might be best to have a workshop check the system as in the end you will need to delete the error messages. They can perform a thorough diagnostic and clear the fault codes correctly.

I consulted a workshop. As you suspected, the issue was attributed to undervoltage, resulting in the fault memory lock. The repair, including diagnostics, battery check, and fault code clearance, cost 240€.