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engine starting & stopping

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Posted by Don Goyette on January 15, 2006, 11:12 pm
 
Often when sitting at a traffic signal waiting for the light to change, the
engine will stop, start up agin, stop,restart,..., every 5 - 15 seconds.
Also, when first turning it on ("READY") if I don't get going right away,
the engine starts up.

Is this normal behavior?



Posted by Mike Rosenberg on January 15, 2006, 11:35 pm
 


I've seen this but not very often, and not with as many cycles as you've
described.  For me, it's most likely to happen when the outside
temperature is in the 90s, and I've assumed it's the A/C running down
the battery.
 

Now this one's normal behavior.  The engine starts up to get the
catalytic converter heated.

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Mike Rosenberg
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Posted by Don Goyette on January 16, 2006, 2:21 pm
 

It happens on mine with the outside temp in the 50s and the AC turned off.



Posted by dbs__usenet on February 1, 2006, 5:27 am
 
That's not normal, and should be looked at.  The engine should stay
off if the car is stoped and the traction battery is charged (as long
as the engine has been warmed up).  Even with the AC (or defroster)
on it should be more than 15 seconds between engine runs.

Posted by TJim on February 1, 2006, 11:21 pm
 Don Goyette wrote:

Near as we can tell, if the batteries are charged up too high, the Prius
will start and stop the ICE just to bleed off some of the charge.  At
least, that's what seems to be happening...

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