Last Updated: May 05, 2021

On Board Diagnostics for Humble Motorists

Some Humble vehicle owners wonder why CMC Auto Care and other Humble auto repair shops charge a fee for vehicle diagnostics.

Receiving a diagnostic charge at CMC Auto Care for a tricky automotive problem shouldn't be a surprise. In the Humble 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 CMC Auto Care diagnosis may be much more involved.

Much of the Humble 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 CMC Auto Care 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 CMC Auto Care 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 CMC Auto Care customers. The service advisor makes a list of the most likely causes and begins tracking down the source of the problem. This takes time.

Humble 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 CMC Auto Care wants to figure out what's wrong with your vehicle and get you back on the road as quickly as possible.

CMC Auto Care
8609 FM 1960 Bypass Rd West
Humble, TX 77338
281-359-4300
www.cmcautocare.com