Peugeot 607 Transport Mode Issue

I've got a 607 too. Something similar happened after I replaced the battery. The car went haywire – error messages, the radio wouldn't work. Your immobilizer might be acting up, or the car's computer needs to be reconfigured to recognize your key fob. Have you tried the spare key?

Thanks! I'll try the spare key. If that doesn't work, is there a procedure for reconfiguring the key fob, or does it require diagnostic equipment?

Reconfiguring the key usually involves a diagnostic system. It sounds like the car's lost some settings. Given the electrical issues, it’s best to take it to someone with the right tools for a proper diagnostic check and recoding. Chasing electrical issues without the proper gear can be a nightmare.

The spare key didn't work. A workshop visit was the right move. It was just deactivating transport mode, and it was free!