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Cat DTC Diagnosis (P0420) – ASE Practice Question (VIDEO)

Description Technician A and Technician B are discussing the troubleshooting procedure for a P0420 (Catalyst Efficiency Below Threshold) DTC. Technician A says that the presence of any other codes should be considered first before replacing the converter. Technician B...

What Shape Is a Piston?

At this late date, if you work in a standard automotive facility servicing late-model vehicles, it’s probably infrequently you even see—let alone think about—pistons. However, if you are in a rebuild shop, a race environment, or the antique space, seeing a set of...

Cabin Filters – ASE Practice Question (VIDEO)

Description Technician A says that cabin air filters protect the occupants from over 200 known contaminants found in a typical car’s passenger compartment. Technician B says that the cabin air filter protects the evaporator core from copper particles emitted by the...

Should You Replace That Damaged Plastic Intake Manifold?

It seems like plastic is everywhere under the hood of a modern car. You even have to remove a plastic cover to find the engine! But plastic and composite parts like distributor caps and ignition coil housings have been in use for over 100 years. In the 1970s,...

Politics Ain’t Politic

Red, blue, or green? You’ve pieced together the point of this article by now, no doubt. This will not be a piece that risks raising the hackles of those who are deeply political. That’s not because you’re encouraged to avoid the topic, but instead, to do what makes...

Belt Noise – ASE Practice Question (VIDEO)

Description Technician A says that "chirp" is the most common type of noise complaint customers bring to the shop. Technician B says that EPDM belts can be worn out yet pass a visual inspection. Who is correct?A) Technician AB) Technician BC) Both Technician A and BD)...

Modern Power Window Switches: Smarter than You’d Think

Modern Power Window Switches: Smarter than You’d Think

When was the last time you rolled down the power windows in an older car or truck? I’m talking at least pre-2000. The older, the better. As a passenger, you’ll find that every door has a mix of buttons, switches, locks, and handles to mess around with, plus maybe a...
What are rear fog lights, and when should you use them?

What are rear fog lights, and when should you use them?

If you’re a vehicle owner or auto repair professional in the United States, odds are that you haven’t seen (or even used) rear fog lights on a vehicle. The vast majority of vehicles sold in the US do not include them, and in some cases, the feature is disabled or the...
What is a core charge?

What is a core charge?

The article title is a question I asked when I was a young counterman, and most of you oldtimer mechanics and parts people of course know the story: the core charge is a way to be sure the smoked part makes its way back to the parts counter. A core charge is a deposit...
Watch this video on the invention of the Ford V-8 engine

Watch this video on the invention of the Ford V-8 engine

If you enjoy pioneering developments in automobile history, this video on the development of Ford’s V8 engine is a must-watch. It’s a bit on the long side (a little over an hour), but it’s well worth your time to fully appreciate this revolutionary success in Ford—and...