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karl_fuchs91

Peugeot 807 MOST Bus Fault

My 2004 Peugeot 807 diesel's audio system is completely dead – no sound at all. The navigation is also kaput. I hooked it up to a diagnostic tool, and it's showing a MOST bus fault. Has anyone seen this before?

4 comment(s)

erwin_mystic1

Yep, I had a similar nightmare with my 807. Check the control units on the MOST bus. A defect there can kill everything. Have you checked the fiber optic cables? They're super sensitive.

karl_fuchs91 (Author)

Fiber optic cables? Where exactly are they located? And how do I even check them? I'm not really a car expert...

erwin_mystic1

They connect all the audio and nav components. Honestly, it's tricky to diagnose without the right tools. I ended up taking mine to a workshop. It turned out to be a faulty amplifier. It cost me around 1000€ to fix, but at least it's sorted.

karl_fuchs91 (Author)

Ouch, 1000€! Sounds expensive, but thanks for the heads up. I'll take it to a workshop then. At least I have an idea what they're looking for now.

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