I work at a garage

A PROFESSIONAL mechanic has shown how parts under a car's hood aren't always as complicated as they appear.

The technician revealed this truth using a client's car in a TikTok uploaded to his California-based garage's account.

Concept 3 Performance's (@concept3performance) video clip began with the garage's founder and CEO William Chang using a code reader to locate his customer's vehicle problem.

Auto technicians use code reader tools to analyze error messages that a car's computer stores.

William said: "Sometimes the car fires, sometimes it doesn't — so, something has got to be stupid."

The experienced mechanic's code reader told William that the customer's car wasn't running due to a faulty air pump.

Next, William opened the client's hood and started looking around the car's engine bay.

William looked around for a few moments before something caught his attention, resulting in him turning to his camera operator with a shocked look.

The camera operator zoomed in on what appeared to be an emissions system vacuum with one disconnected line.

William plugged the line into the emissions system vacuum and re-entered the car.

The video's camera operator said off-screen: "No way that's it."

After reattaching the car's fuel pressure regulator vacuum line, William successfully started the vehicle and laughed to himself about how easy the fix was.

One viewer commented on this garage's TikTok: "One thing my grandpa always told me, ‘When working on something mechanical, check the little things first.'"

Another TikTok account wrote: "Sometimes the simplest answer is the correct answer."