2013 Citroen Berlingo engine management light orange triangle comes on on 2013 1.6hdi

"Citroën Berlingo Service Warning Triangle Warning Light
Service
The orange triangle containing an exclamation mark is a 'service' warning light an appears on the MK 2 version of the Citroën Berlingo only. The warning triangle indicates minor faults when temporarily lit, or major fault if the light stays on constantly. "

Could try changing fuel filter or get it scanned for fault codes

Cheers bud had full service done fuel filter ect
They replaced air flow meter as fault code were showing that fault that didn't work they rang up citroen they said change some fan which one I don't know unfortunately they were out of stock and on back order they tried another fan and hoped it would be recognised by ecu by driving it 300 mile it still hasn't so my dilemma is to get fan replaced and hopefully cures problems

You would think replacing the MAF which showed a code would have fixed it , strange . May have been the engine/ rad coolant fan but whatever it must be a common fault if on back order . Big problems still with some parts , hope you get it fixed soon .