Citroen Berlingo engine light

Could check the wiring but likely to be sensor which is expensive . But scan it for fault codes first before getting too involved

I did scan it and it says UO59E/$07E invalid data received, and it has it listed 3 times. It started when the urea and engine light flashed up so I put 10 litres of adblue in the adblue tank and reset it then 2 days later they came back so I reset it again then 3 days later the engine light came back on. Something on my scanner also mentioned nox