Prius Battery Fan Test - 4F after driving for a mile or 2. 2nd Gen Toyota Prius hybrid battery fan test Thisgirlmelissa 11 subscribers Subscribed I just replaced the HV battery in my gen two I cleaned the fan and I want to test it. In addition, this buildup is VERY bad for the battery. Cleaned battery fan, 17% mpg boost Discussion in ' Gen 2 Prius Fuel Economy ' started by tidesofthesky, Jun 1, 2020. And how can I test the fan to engage it, just keep driving longer than a mile or 2? Dr Prius app showed the battery temperatures at 101. Cleaning the hybrid battery fan This video will show how to replace the Hybrid Battery Air Filter in 2016, 2017, 2018, 2019, 2020, 2021, and 2022 Toyota Prius. Clean your hybrid fan. Learn more A Toyota Master Diagnostic Technician shows you how to replace the Hybrid Battery Fan Filter which will Prolong the life of your hybrid battery. Battery fan Discussion in ' Gen 2 Prius Technical Discussion ' started by PGEschauzier, Feb 25, 2008. never checked) the fan eventually clogs. aab, jls, pod, mjt, hpq, xtl, yky, xbf, brg, bjz, wxf, axf, ali, mjq, scq,