Don’t you wish you could stop time and see all of the values from when the glitch occurred?
You can with the coverage for GM vehicles in the latest Snap-on diagnostic software.
With your scan tool hooked up to the vehicle, go to the System menu and select Engine, then Codes Menu, followed by Freeze Frame Failure Records.
Select the code you want to see. In this example we’ll use P0102: Mass Air Flow (MAF) Sensor Circuit Low Frequency (Symptom 00).
The scan tool will show you what every vehicle system was doing when the error occurred, including key system data.
Now you can see the clues that used to be invisible – stop time to save time and fix the vehicle faster.