A possible cause of the "engine malfunction. repair required" on Peugeot 207 or RCZ

In this video, we can see a problem that occurs in Peugeot 207 or RCZ cars, when the message "engine malfunction, repair needed" appears on the display. The YouTuber was aware that the issue, which occurred after a long trip, could be attributed to the recirculation valve. So, first of all, he explains the theoretical characteristics of a turbocharged engine; but what happens when we change gears or lift our foot off the accelerator? The throttle body closes, but the turbocharger continues to spin, blowing air towards the closed throttle body. This is where the recirculation valve comes into play, opening to allow excess air to flow back through the intake, creating a closed and balanced air circuit. The recirculation valve has a membrane, and the membrane can break, allowing air to pass through even when it should be closed, during acceleration. This results in a decrease in performance, as not enough compressed air reaches the intake valve. The basic tools needed for the job are shown, and we open the hood. The recirculation valve is located just below the air intake pipe from the filter, which is advisable to remove first for better access. We disconnect the electrical connector, loosen the metal bracket, detach the rear cable, remove the intake air pipe, and then use a ratchet wrench to remove the three bolts holding the recirculation valve. We disconnect the electrical connector and remove the valve, which can be found on AliExpress with the code 4000735921641 for 41.93 euros, with free delivery. We will follow the reverse instructions for installation.