Underhood Service

06/02/2026

P0015 is often one of those codes that comes back no matter how many times you clear it. The worst part is that often there are no symptoms or customer complaint, just a check engine light. Here's what you should know about clearing this code, and others like it:

Engine position codes like P0015 seem like they come back no matter how many times you clear them from the car.

06/01/2026

What’s that noise?

One quick way to check for a worn wheel bearing is to raise the vehicle and test for play. Grab the tire at the 12 and 6 o’clock positions and rock it back and forth. If you feel movement on a sealed hub or bearing assembly, that is a sign something is not right.

Simple checks like this can help you diagnose wheel end issues faster and keep vehicles safe on the road.

Learn more about BCA Bearings: https://bcabearings.com/

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05/29/2026

Thermal runaway events are rare but serious. Early recognition and proper procedures help reduce risk and support safe service operations. Learn more in the latest video from our EV IQ series:

Thermal runaway EV is a condition technicians need to understand as...

05/26/2026

There’s a learning curve to understand battery management systems, how they work, and what the diagnosis and repair process will be like. Learn more in our story:

There’s a learning curve to understand battery management systems, how they work, and what the diagnosis and repair process will be like.

05/21/2026

Get ready for 0W-8 for Asian imports and 0W-12 for some European engines. Learn more about these oils in our story:

When it comes to engine oils on import cars, get ready for 0W-8 for Asian imports and 0W-12 for some European engines.

05/18/2026

You have to be mindful that some vehicles may have two thermostats. These two thermostats may be listed differently in the catalog, so make sure you’re looking at the picture to see if you have the correct thermostat for the application.

Learn more by watching the full video: https://bit.ly/4neqNrv

05/14/2026

Many recalls happen because the auto manufacturer is obligated to keep that emission system running where it should be for either 85,000 or 100,000 miles. These recall items need to be performed before you can solve that emissions problem that may be related to the catalytic converter or the oxygen sensor.

Learn more in the full video: https://bit.ly/3QWfQ20

05/11/2026

Here's a sneak peek 👀 at the Underhood Service section of May's ShopOwner magazine. The magazine is in the mail on its way to readers now!

05/05/2026

The mass air flow sensor reacts to misfires, vacuum leaks, and almost every driveability issue, which is what makes it tricky to diagnose. Here's what you need to know about the mass air flow sensor:

The mass air flow sensor reacts to misfires, vacuum leaks, and almost every driveability issue, which is what makes it tricky to diagnose.

04/29/2026

You've probably heard that marketing claim out there that light bulbs dim over time, especially headlights. Is it true? Watch this month's Maintenance IQ for the answer: https://bit.ly/41NCiwj