Laguna Error Message and Engine Light

Incorrect coding could cause that. Did the error appear after any work on the car, like replacing a control module? Have you tried resetting the codes with the diagnostic scanner?

Thanks. The error appeared spontaneously, no prior mods or repairs. I tried resetting the codes, but the error reappeared immediately. Deeper diagnostic needed?

If the code returns instantly after a reset and nothing was changed, coding is likely the issue as you thought. A Renault specialist would be the best bet.

Thanks for confirming my suspicion and the advice. Local workshop recoded the vehicle. Error messages are gone, and the car runs smoothly again. Cost 360€.