The check engine light solely comes on once the vehicle’s computer believes there is an actual problem.
The computer can provide a bother code that indicates either the condition that led to the code (like “Lean condition”) or the system that it believes to be functioning incorrectly (like “EGR flow insufficient”).
Whether your vehicle may be a Toyota, Lexus or Scion, the very first thing you ought to do is check for a significant problem that needs immediate attention.
Check your dashboard gauges and lights for indications of low oil pressure or your temperature gauge shows your engine is really overheating, either of which might need you to immediately pull your vehicle over and shut off the engine. On some cars, a yellow check engine light-weight means that you ought to investigate the matter, whereas a red or blinking check engine light-weight means that you need to stop immediately.
Sometimes the failing system may be electrical in nature that will provide a code like “Open or short in coolant temperature sensing circuit,” within which case, there is probably a circuit issue either within the temperature sensing element itself, or the wiring between it and the vehicles computer.
Some failures will not be in any of the items listed above, however, they are usually the result of poor power connection or poor ground that is providing the power to the vehicles computer that controls its ability to diagnose properly. In any case, regardless of what, the issue/warning code is it must be diagnosed. it isn’t uncommon for individuals to believe that their car by having a computer completely eliminates the necessity for physically checking the vehicle.
A computer indeed is a marvelous tool that aids the car owner in quickly understanding a problem. It’s helpful enough that we’ve invested a lot of time, effort and thousands of dollars in choosing the best computer and all that goes into keeping them updated, however, the fact remains that a computer is still simply a tool; it isn’t magic, and it does not recognize everything. We are heavily dependent on the technician’s experience, and judgment. Because of the complexness of the vehicle’s system.
During that diagnostic time, we are going to do what will be best to help your vehicle needs. Once we have diagnosed the issue, it will go 3 ways. Best case situation, we have a quick and concise diagnosis of your vehicles issue and repair it.
Next best, and actually quite common, we have diagnosed your Toyota and will leave the decision to repair up to you, equipping you with the information of our diagnosis in the form of a quote for the repair. At that time, you’ll be able to say affirmative or no.
Worst case and this very unusual we have reached the end of agreed-upon diagnosis time and that we still haven’t been able to ascertain the reason behind the problem. As we have stated before this worst case situation is quite uncommon, however, it is a real possibility.
People usually ask if we charge for diagnostic time. The answer is affirmative. The additional question that is often raised is if we also charge for a diagnostic time if they agree to do the service or repair. The response to that question is that to the extent that the diagnostic efforts and the repair efforts overlap, the client gets the benefit of that overlap. To the extent that diagnostic efforts and therefore the repairs are separate, they’re going to be charged for on an individual basis. So, for instance: If we’ve got to dismantle one thing so as to inform you that it’s defective, then we have a tendency to might already be halfway through the labor needed for replacement, and in fact, you will get the best part of this situation. But, if we have performed a diagnose on a part that does not need to be disassembled, then the repair is a completely different activity which would be billed on top of the diagnostic time.