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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...

ADAS Alignment and Calibration – ASE Practice Question (VIDEO)

Technician A says thrust angle must be set to zero on many ADAS-equipped vehicles during alignment. Technician B says the steering angle sensor and front wheel position must be correct before camera or radar calibration. Who is correct?

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