What does it mean when it says engine malfunction (amber)?

Could mean a lot of different things. from gas cap to evap canister to a sensor, you need someone to pull the codes and determine why its on. Then what made the car throw that code.

Limp Mode for the transmission! Never put your mobile phone anywhere near the centre console, because it's handshake signals with a cell site can send your transmission computer haywire. Remove the phone and switch off the ignition for 6 minutes (?) and it will correct itself. A cell phone can also send the electric handbrake into fits of binging and bonging from the dash, as well as doing strange things to the gearbox computer. (have battery checked.) That's if you are lucky! Unlucky and you have a lot of cheque writing in front of you!