ASE Question Of the Month 
Sponsored By
 
Federated Auto Parts
 
Which is correct?

You’re correct if you answered C!

Both technicians are correct. When the DEF tank runs dry, a countdown clock starts and if the tank is not refilled prior to the end of that countdown, the vehicle will not start. Additionally, the quality of the DEF is critical to the operation of the catalyst. Poor quality or contaminated fluid can lead to system DTCs.      

Now that you’ve tried the question, be sure to click the link below and enter our random drawing for a collectible diecast, provided and sponsored by Federated Auto Parts!

Enter the monthly contest from Federated Auto Parts by clicking here.


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