Monthly Archives: March 2019

Check Engine Light Code Reading

Check Engine Light Code Reading

Over the past couple of decades, a myth has arisen that all that is needed to diagnose a vehicle problem, such as a check engine or airbag light, is to hook it up to an automotive diagnostic scanner and an accurate answer will be produced. And now that they’re as cheap as $70, anyone can diagnose their car and know exactly what’s wrong. If only life were so easy. So, where does the information that the diagnostic computer or scanner receives come from? This information, what are sometimes referred to as trouble codes, comes from sensors. These sensors only know that there is an incorrect reading from a specific component, such as an oxygen or crank position sensor, they don’t know why the reading is incorrect. Is the sensor itself faulty, or is it the wiring, or the engine management computer? It could be more than one thing, especially on an older vehicle. The code points in a direction, it doesn&r ... read more

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