Espace MOST Bus Audio Failure

MOST bus issues can be a headache. It's how the multimedia components communicate using fiber optics. If there's a break in the loop, things shut down. Losing audio and navigation points to a problem with a control unit on that bus. The error code confirms it. Have you had any work done that might have involved disconnecting components? Like the amplifier, head unit, or navigation module?

Thanks! Fiber optics sound expensive. I haven't touched anything! It was running fine, then silence. If it's a break in the loop, can I pinpoint the faulty component, or do I replace everything until it works?

Pinpointing the exact component without diagnostic tools is tricky. Because it's a loop, one faulty module can knock out the system. It could be a loose connector, or a module failure. Given the symptoms and the error code, it's likely a defect in a control unit on the MOST bus. I recommend taking it to a workshop familiar with Renault systems and MOST bus diagnostics. They can use a tool to read the bus and identify the culprit.

Thanks for the advice. I was hoping for a simple fix, but I'm out of my depth. I'll book it with a Renault specialist. I got the car back from the workshop and you were spot on! A control unit on the MOST bus had failed. New part and labor cost 1000€, but I have my tunes and navigation back!