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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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P0420/P0430—The #1 DTC in the Country

DTCs (Diagnostic Trouble Codes) P0420 and P0430 are generic industry codes and part of the OBD-II standards. The descriptor labels the code(s) “Catalytic Converter Efficiency Below Threshold – Bank 1 (or 2)”. And the number one part sold to repair this problem is a...

Troubleshooting Fuel Trim–ASE Practice Questions (VIDEO)

Description Technician A and Technician B are discussing ways to use fuel trim as a troubleshooting aid. Technician A says that fuel trims that are correcting for a lean condition at high RPM and load conditions indicates a problem in fuel delivery. Technician B says...

Add or Delete These Simple Parts to Help Customers Save Money

Looking for an easy way to win over your customers that they’ll enjoy every time they drive? Look at their vehicles from a hypermiler’s perspective. In case you haven’t heard the term before, the hypermiling community is obsessed with optimizing their vehicles’ fuel...

Are You Properly Checking Hub Bearings For Wear? (VIDEO)

Description The old “grab the wheel and shake” test you may have used for tapered bearings doesn’t apply for the hub bearings found on most of today’s vehicles. Pete Meier explains how a dial indicator is necessary for a true wear check.Related Videos

Efficiency is the Name of the Game

Someone once told me that successful auto repair is a game of inches. But in our fast-paced, ever-evolving industry, inches are no longer accurate—we need to hit the bullseye every time. Margins are tighter, technology is advancing rapidly, and customer expectations...

Misfire Cause–ASE Practice Questions (VIDEO)

Description Technician A is diagnosing a misfire. He states that a misfire is caused by a fault in the ignition system and that new plugs and coils will repair the problem. Technician B says that a misfire is detected when the ECM detects a variation in crankshaft...

A History of the U.S. Presidential State Car (Part 2)

In Part 1 of this piece, I traced the history of the U.S. presidential state car from the beginning to the Kennedy Lincoln Continental. In this part, I’ll pick up with President Lyndon Baines Johnson’s state car and continue to the present day.1967 Lincoln Continental...

Why Wheel Fastener Torque Matters More Than You Think (VIDEO)

Description If you’re still using torque sticks and impact power to install lug nuts and lug bolts, it’s time to reconsider. Pete Meier explains why the torque wrench is the only correct tool for the job … and what can go wrong when you don’t use one.Related...

Let’s hear it for the mighty roach coach

Let’s hear it for the mighty roach coach

by | Feb 9, 2023

Forget about tangy Korean short rib tacos, succulent Maine lobster rolls, and decadent softball-sized cupcakes. Before taking up residency in hip neighborhoods around the country, food trucks were just an easy way for hard-working folks to get a hot bite quickly;...
February Automotive Horoscopes

February Automotive Horoscopes

by | Feb 7, 2023

Aries: Stress around the shop is about to melt away. Resist packrat urges—letting go is just as important as gathering items of value. Spruce things up! After work, be careful not to overdo things in extracurricular matters. Pay careful attention to the cars above you...
Clean the #&@$ing snow off the roof of your car or truck

Clean the #&@$ing snow off the roof of your car or truck

by | Jan 31, 2023

As we are deep into winter here in the northern hemisphere, I believe it’s time for this seasonally appropriate rant: clean the #&@$ing snow off the roof of your car or truck. Look, I’ve been there. You’re running late for work after a big storm the night before,...
February Automotive Horoscopes

January Automotive Horoscopes

by | Jan 10, 2023

Aries: You may not think of some of your repairs as innovative, but a creative fix is a creative fix. Your outlook is out there, and that’s OK. Expect to see someone else cribbing your notes but remember to take it as flattery. Not everyone has the same gift of...