First step is to get the codes read.
Second stage is to find some enthusiast Pug 207 forums and post there. Here's a possible enthusiast forum:
https://www.peugeotforums.com/threads/207-1-6-se-the-dreaded-depollution-system-faulty.206322/
And these may help
https://m.youtube.com/watch?v=MW_h187gSMI
https://m.youtube.com/watch?v=j0jKKNBDJjM
https://www.fixya.com/cars/t11878983-peugeot_207cc_1_6_warning_message
https://www.ecutesting.com/common-faults/peugeot/peugeot-207-ecu-common-anti-pollution-fault/
https://www.honestjohn.co.uk/forum/post/index.htm?t=110253
Roggooymyj
December 2021
