Many customers call asking “What could Check Engine Light mean? And many customers wonder why we have to do a Diagnostics Check; Diagnostic tests are valuable, they help the Technician detect small problems before they become major fixes. Please don't ignore your Check Engine Light. There are many reasons your “Check Engine Light is on” this light is part of your cars’ on-board Diagnostic System, getting read from the cars’ computer. Reasons the Check Engine Light is on: 
- Engine Problems
- Transmission Problems
- Emissions problems:
- All the different Modules and Sensors
- Air/Fuel delivery problems
- Ignition
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