Note: Exact intervals depend on engine type, payload/use, and regional emissions rules. Use manual's service book for certified schedule. Typical guidance:
The 2018 Daily has a sensor that requires a key cycle sequence. Page 142 (varies slightly) explains: "After refilling AdBlue, turn ignition to ON (do not start) for 30 seconds. Turn OFF for 10 seconds. Restart engine. The warning will clear after 2 minutes of driving." iveco daily 2018 user manual
Avoid PDFs that require payment. Iveco provides the 2018 user manual free of charge as a download. If you see a site charging $19.99, it is a reseller, not an official source. Note: Exact intervals depend on engine type, payload/use,
The manual explains what to do when each light appears—e.g., drive at constant speed above 40 mph for DPF regeneration. it is a reseller