Lexus SC Incorrect Coding Fault

Sounds like a coding issue. Did you recently have any work done that might have messed with the car's computer? Maybe a new module installed or something? Gotta figure out what changed before this started.

No recent modifications or component replacements that I know of. Is there a diagnostic procedure or software tool you recommend for verifying the vehicle's coding and identifying discrepancies from the factory settings?

If nothing's been touched, it's kinda weird. Could be a glitch, but more likely the module's gone haywire. You'll probably need to take it to a workshop with the right tools to recode it properly. Chasing ghosts with that stuff ain't fun.

Based on your recommendation, I took it to a trusted workshop for diagnosis and recoding. The repair cost 360€. Thank you for your assistance; it was invaluable.