The red led is also used to show that dtc s are present.
Engine light code reader autozone.
Obd ii readers and services like autozone s fix finder are pretty useful for diagnosing the cause of a glowing cel.
We re more than a little familiar with the types of issues that cause the check engine light to become illuminated so we ve compiled a list of the top 5 reasons why the check engine light is on.
Our obd2 scanners and other diagnostic tools also help you keep track of your previous vehicle repairs.
With our wide variety of code readers you can get to the root of the problem in no time.
These tools will not work with any other device other than the z net terminals at autozone.
Autozone s free fix finder service.
Remember to return the scan tool to an autozone employee when finished.
These tools can take the guesswork out of reading and clearing check engine light codes on most models.
Reading as a series of five letters and numbers the dtc allows you to home in on the system that is not functioning properly.
In this case the malfunction indicator check engine lamp on the vehicle s instrument panel will light steady on.
Keep in mind that vehicles made since 1996 require an obd ii reader but some scan tools are able to.
Obd scanners and code readers pull trouble codes from the vehicle s computer to help determine what may have caused the light to come on.
Free autozone fix finder service check engine light diagnostic tool.
For example if your vehicle s obd detects a leak in the evaporative emission system you may see a p0442 code.