Symptoms of a Bad or Failing ECM-Power Relay. The ECM, or electronic control module, is the computer responsible for controlling all of the engine management functions. It is the central control unit of most vehicles and controls a variety of functions, such as electrical system power distribution, emissions, ignition, and fuel systems.
1 Replace the tire if the top of Abe's head becomes uncovered by any of the grooves.  If your tires are only partially worn, find out how much. Stick a tread-depth gauge (about $5 at auto-parts stores) into each of the grooves on all four tires, as shown in the photo below. Then check how many inches of usable tread remain and match your driving to the tread wear.
How to check your tyre tread depth: A quick visual check of tread depth can be made by looking at the wear indicators which youâll find in the grooves of the tread pattern. This will give you a guide as to how close a tyre is to the legal limit.A tyre should be changed before the tread reaches the level of the depth indicator but ideally at 3mm. tyre with 1.6mm can take nearly 50% further to stop a car in the wet compared to a new tyre with 8mm of tread depth. TOP TIP: Driving with tyres below the 1.6mm limit is not only an MOT failure but also illegal.