Maintenance Archives - UnderhoodService
Beyond the Warranty

What does it take to keep a car going for 120,000, 180,000 or 250,000 miles? The key is maintenance and inspection. 

Hybrid Vehicle Fluid Maintenance

There are opportunities your shop can’t pass up just because the car or SUV has a hybrid badge on the back.

CAN Bus Communications

There are three types of bus configurations that you will come in contact with — loop, star and a hybrid of both.

Fuel Trims

To gain a better perspective on fuel trims, think about how “analog” vehicles dealt with changing fuel and air mixtures.

High-Pressure GDI Fuel Pumps

When solving a fuel pump issue, the scan tool is your best friend.

Cooling System Leak Testing

What replaces the conventional water pump and thermostat is electronic thermostats and electric water pumps.

Cylinder Deactivation And Active Fuel Management (VIDEO)

Deactivating a cylinder requires specific technology. This video is sponsored by Auto Value & Bumper To Bumper.

Long-Term Fuel Trims and Filters (VIDEO)

Long-term fuel filters need to be watched and maintained. This video is sponsored by Auto Value & Bumper To Bumper.

How Extended Interval Oil Filters Have Been Improved

Over time, the oil filter can collect enough contaminants to become restricted. Here’s why new filters are better.

Smart Car Care App Reminds Customers Of Service Needs

The app provides peace-of-mind as a reference tool and for providing important maintenance reminders.

Gapping Spark Plugs

For modern fine-wire spark plugs, you should not measure the gap unless instructed by the manufacturer.

VIDEO: Maintenance Module Walkthrough

Utilize this feature at the front counter and in the bays. This video is sponsored by Mitchell 1.