Chico Diagnostic

January 10, 2023

Chico Diagnosis


Chico auto diagnostic testing is recommended when your car has some issue that is not self-explanatory. A diagnostic is an analysis of your car’s many computer systems. When we run a diagnostic on your car, we scan your vehicle’s various computer systems to find the problem.


The diagnostic will also tell us the codes your car is reading. These codes will help us repair your vehicle. Unfortunately, sometimes we have to diagnose things the old fashion way, chasing electrical wires and manually testing components on your car.  Diagnostics test things such as your car’s engine and components, transmission and surrounding areas, brakes issues, and exhaust system faults. Auto diagnostics have many benefits. One of their benefits is that they can detect problems before they become more harmful and potentially catastrophic.


Did you know that there are multiple different kinds of auto diagnostics?
There are P codes, B codes, TPM codes, HBS codes, and SRS codes. There are also diagnostics for hearing clunks and noises and pressure check leaks.  P codes – Powertrain codes will appear when an issue occurs with your engine, emissions system, or transmission. For example, a P300 code is a random misfire code. This means the cylinders aren’t giving enough power to the rest of the car.  B codes – The body code system includes climate control, airbags, and the lighting system. If there are issues with any of these, this code will appear.  TPMS codes – TPMS stands for tire pressure monitor system codes. These codes will appear when there is excessive wear and tear on your tires. Also, when there is poor traction and harmful fuel emissions, your tire is at risk of going flat.  SRS codes – SRS codes appear when an issue is with your vehicle’s airbag. For example, it could be with the airbag module, the sensors, the clock spring, or a problem with the SRS module itself.  AC Diagnosis – AC diagnostics must start with an AC recharge. Once that step is complete, the pressure and weight of the refrigerant will be measured. They can be measured with a machine; we use a Robin Air machine or, the old fashion way, with an AC manifold. Noises – There are also diagnostics for if you are hearing concerning or unusual noises. To figure out what these are, technicians do a series of things. Sometimes, they can spray fluids, like WD-40, on the area suspected to be the problem. Other times they may move around or apply pressure on the parts to see if they will make the noise, then diagnose it from there.

Sounds are essential. Some sounds can almost guarantee that you are in trouble. Some include Brake squeals, popping noises, howling or singing, grinding or growling, and clicking noises.


Volkswagen invented the first diagnostic computer scanning system in 1968. Followed by that, Datsun introduced an OBD system in 1978. Finally, IN 1980 GM introduced the flashing check engine light. This was also known as the RS-232 check engine light system.  In 1991, California required all vehicles to have basic onboard diagnostics, also known as OBD l. Later, in 1996, all cars in the United States were required to have two OBD diagnosis systems.


If you have a light shining on your vehicle’s dash, your car is chugging and bugging, or just flat-out not running right, come on to Tedious Repairs, and we will have your car fixed in a jiffy! We will run a quick auto diagnostic Chico for you, fix your car, and have you on your way! So call, or book an appointment today!

Buddy Rausch

Buddy Rausch

Buddy started his auto career journey at Butte College and started his own auto repair company in 2007. Since then he has worked on countless cars, diagnosing, repairing, and replacing worn, faulty, and broken parts.

After a few years, he moved to a bigger shop to accommodate his growth and to better serve the Chico, CA community. It’s a family-owned & operated business.

Outside of work Buddy enjoys spending time with his family and playing softball is one of his many passions.

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