Peugeot 308 Turn Signal Issue

Indicator light problems can be tricky. When you say the 'dashboard keeps flashing an error', is that a specific error code? And does the signal lamp actually light up at all, even dimly? Sometimes it's not the bulb itself, but a faulty flasher relay (the part that makes the light blink) or even a bad earth connection.

No specific code, just a generic 'lighting fault' message. The signal lamp doesn't light up at all, completely dead. Where exactly is the flasher relay located? Is that something I could check myself?

Okay, a completely dead signal lamp points away from a simple bulb issue. While it could be the flasher relay, on a 2021 model, it's more likely a defective cable or plug connection to the lamp unit itself. Given the symptoms and the car's age, it might be best to have a workshop take a look. They'll have the diagnostic tools to pinpoint the exact problem quickly and safely.

Thanks! Took it to a local garage, and you were spot on. It was a corroded connector. They cleaned it up and replaced a short section of cable. Cost me 95€. Appreciate the help!