Engine Trouble is a mission in LEGO City Undercover: The Chase Begins.
Walkthrough[]
Proceed to the scene of the next fire. You'll find the flames hard to put out. Change to the Police Officer costume and follow the footprints to the "X" that is on the ground. Dig up that area to find the pieces to the firetruck. Throw the pieces on the truck to fix it up.
Then smash all the boxes that are around the firetruck to find more parts. Throw those parts onto the firetruck as well. After the firetruck has been completely fixed, go to the nearby valve connected to the large water pump. Turn the valve to fill up the truck and then get control of the hose. Spray down the fires to put them out and then drive the truck through the garage door.
Drive the truck to the next fire and get behind the controls of the hose again. Put out this fire and then hop out of the truck. Change into the Construction Worker costume and then go mess with the box on the wall. This will make the garage door open up and then another firetruck will be revealed.[1]