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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,...

This Tool Makes Fuel Line Repairs So Much Easier (VIDEO)

Description Whether you’re a tech or a DIYer, quick disconnect tools are a must for modern fuel, A/C, or transmission line jobs; no more fighting clips.

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)...

For Over 50 Years, France Required Yellow Headlights … Until Science Disagreed

Ever try those safety glasses with yellow lenses that are supposed to improve your vision? It’s hard to tell if they really do anything, but the packaging usually has a lot to say about better contrast and depth perception, reduced glare, and less eye strain. (And...