Shop Press

Shop Press is the news and idea hub for everything related to working on cars and trucks, focusing on repair, technology, and wrenching lifestyle.

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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)...

Average U.S. vehicle age reaches new record high, again

Average U.S. vehicle age reaches new record high, again

Does it feel like the cars and trucks in your repair shop keep getting older and older? Well, that’s because they are. The average U.S. vehicle age is now up to 12.5 years, according to a recent analysis by S&P Global Mobility (formerly IHS Markit). That’s a new...
Right to Repair gains momentum in Maine

Right to Repair gains momentum in Maine

The state motto of Maine, “Dirigo,” Latin for “I lead,” is being embraced by the members of the Maine Right to Repair Coalition who find themselves at the vanguard of a movement to ratify legislation that protects independent repair shops. Last February, a referendum...
Which road maintenance fleet has the best snowplow names?

Which road maintenance fleet has the best snowplow names?

Asking the public for creative input can sometimes be an effective way to crowdsource ideas and foster community engagement. Or, it can be an exercise in large-scale trolling, as we saw with the infamous tale of Boaty McBoatface. Nevertheless, over the past few years,...