On Board Diagnostics for Rowlett MotoristsFebruary 24, 2019

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Some Rowlett vehicle owners wonder why Lewis Complete Auto Repair and other Rowlett auto repair shops charge a fee for vehicle diagnostics.

Receiving a diagnostic charge at Lewis Complete Auto Repair for a tricky automotive problem shouldn’t be a surprise. In the Rowlett area, automotive diagnostics can cover quite a range. If you hear a noise in your vehicle brakes when you slow down in rush-hour traffic on a busy TX road, you pull off at the next off-ramp and take a quick visual check. That is usually enough to know what needs to be done. If you’re having an intermittent problem with your vehicle engine, however, a Lewis Complete Auto Repair diagnosis may be much more involved.

Much of the Rowlett driver’s confusion comes when the problem involves the Check Engine light. The Check Engine light comes on when the engine management computer has sensed a problem.

There’s a common misconception among TX drivers that the trouble code tells the Lewis Complete Auto Repair technician exactly what’s wrong. They wonder why there is a diagnostic charge because the scanner quickly gave the diagnosis.

In reality, it is not that easy and straightforward. The computer monitors many sensors throughout the vehicle. When one of these sensors has a reading that’s out of parameters, the computer will record a trouble code and turn on the Check Engine light.

The vehicle computer’s trouble code just tells the Lewis Complete Auto Repair technician what engine parameter is out of range, not what’s causing it. The technician needs to determine the underlying problem that’s causing the malfunction.

There are many problems that could cause a troublesome sensor reading for Lewis Complete Auto Repair customers. The service advisor makes a list of the most likely causes and begins tracking down the source of the problem. This takes time.

Rowlett service centers subscribe to databases that document possible causes for all the possible trouble codes. The databases outline procedures for confirming a diagnosis and provide the documented repair. These  databases are specific to each vehicle and engine combination.

Some diagnoses are quick and easy. Others are more involved, time-consuming and difficult. Of course Lewis Complete Auto Repair wants to figure out what’s wrong with your vehicle and get you back on the road as quickly as possible.

Lewis Complete Auto Repair
5110 Grisham Dr.
Rowlett, TX 75088
972.475.4800