Vehicle: Mazda Familia
Customer: Mr Kumara.
Customer Occupation: Businessman, Giriulla.
Faults:

• Low fuel consumption.
  Reason: Electrical resistance increased in spark plug.
  Solution: Proper Spark plug replacement.
• Centre lock system not working.
  Reason: having a wire is broken in this system.
  Solution: Broken wire soldered in this system.
• Automatically engine stop (Crank sensor receive impossible signal rang randomly).
  Reason: crank sensor sent impossible signal range.
  Solution: Crank Sensor replacement.
• Brake light, ABS, Air bag indication during drive vehicle.
  Reason: have a wire is broken in wheel speed sensor.
  Solution: soldering rear wheel speed sensor wire harness.

Customer Feedback: Some technicians decided ECU or Injectors or fuel relief valve or oxygen sensor should be replaced for correct this fault, but you correct this by replacement of spark plug. Wow you have excellent knowledge and you have all round skills in Automobile.