I noticed a noise on my Peugeot 208 Active 1.2L when under the bonnet. It sounded like air escaping. I eventually found it to be coming from the small circular disk between the engine block and the air filter. From my under standing this is the PCV valve. I popped the plastic cover off to expose...

Please help my engine management light came on then the spanner 🔧 light then the adblue !!! My local garage topped the adblue up and knocked the lights off , I drove for 15 miles then the same lights came back on 🤦‍♀️🤦‍♀️🤦‍♀️ It’s a 2017 208 gt-line diesel ☹️☹️ Any help please ??