Yellow engine light is shining.

Hello together. I’ve searched the forum before, but found nothing suitable. At my Twingo 2 year 2008, 1.2l 58 HP, the yellow motor lamp and the symbol with the mouth lock light up since yesterday. I changed the spark plugs and the air filter yesterday. On a short drive, the two lights went on. At a glance under the bonnet I saw that the plug was off at the front of the suction bridge. After plugging on the two lights continued to glow. only from the plug that the error is permanently stored? Is there a trick to get the lights out again? Does battery help to clamp off? Greetings. Helmut