What is involved in diagnosing a check engine light problem?
In order to diagnose a check engine light a technician needs to connect a diagnostic scanner to your vehicles on board computer. Your vehicles on board computer will store a code(s) for any specific problems it has found and the technician can read the code using the diagnostic scan tool. After the technician discovers the codes a series of tests are performed to figure out the exact nature of the problem. Depending on the severity of the problem it may take several hours to diagnose and repair the problem.
