How can I check the codes on my Mack truck?

The check engine light came on in my Mack truck. How can I check what the error is?

Answer
Checking your onboard diagnostics and codes is essential for making sure your truck runs smoothly. Therefore, you should definitely check the codes if something pops up.
To check an error code on a Mack truck, you need a scanning tool that runs an onboard diagnostics scan. As technology has advanced, most cars and trucks now have computers that help run diagnostics when there is an issue
Many auto parts stores and online companies now sell scan tools that allow you to plug into the computer and find the error code. If you aren’t able to get a scan tool, you have a few other options.
Depending on the year of your truck, you could try reading the flashes of lightning bolts. Some people have had success counting the flashes and correlating them with an error. On older models, some have had success with turning off cruise control and holding the set/resume button. This may flash the computer code using the electronic malfunction light.
If neither of those options work, take your truck to a Mack dealership or repair shop. Both should have tools available to properly read the error code.
If this is a continuous problem, you may want to consider an extended warranty for your truck if it’s not currently under warranty.
Furthermore, your check engine light could cause damage to your vehicle or make it unsafe to drive. In this instance, make certain that you have the proper insurance to give you peace of mind. Use the Jerry app to compare quotes from top insurance companies and get the best price possible.
Emily Maracle
Answered on Oct 20, 2021
Emily Maracle is a car insurance specialist living in New York. Originally from the Pacific Northwest, she has a degree in English Literature and a background in customer service. She enjoys cooking, gardening, and living sustainably. In the future, she can't wait to upgrade to a hybrid or electric car.
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