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2014 Prius C engine runs continuously without charging batteries

Discussion in 'Prius c Technical Discussion' started by Joe McMann, Jul 26, 2019.

  1. Joe McMann

    Joe McMann Junior Member

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    About 2 days ago, I noticed that my 2014 Prius C (with about 42,000 miles) keeps the engine running even though the batteries are charged (no indicator arrow that engine is running). I have replaced the 12v battery about 2 months ago; I live in the Houston area (hot), and the rear footwell vent (driver's side) is not blocked. My mileage has been going down lately (from about 52 mpg to 45-49), but I didn't notice the continuous running until a couple of days ago. What gives?
     
    #1 Joe McMann, Jul 26, 2019
  2. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    The vent cover is one thing, the fan is another. Have you popped off the panel to clean the fan itself? A hot battery can give you those symptoms.
     
    #2 Leadfoot J. McCoalroller, Jul 26, 2019
  3. bisco

    bisco cookie crumbler

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    how hot is it? what was last summer like, no odd behavior? how many miles on her?

    lower mpg's are certainly to be expected
     
    #3 bisco, Jul 26, 2019
  4. Joe McMann

    Joe McMann Junior Member

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    Well, I had little hope that this was the problem. There was nothing blocking the vent, BUT when I pulled the vent panel, I found that the filter pad was completely clogged. I cleaned if off, and it appears that this fixed the problem. Thanks!
     
    #4 Joe McMann, Jul 27, 2019
    dubit, bisco and Leadfoot J. McCoalroller like this.
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