ICE running when stopped

Hello guys,

Hope you can give me an advice because my 2nd gen Prius started to act strange after 6 years.

The problem I noticed is that the ICE is running too much, for example even when I am stopped after 30-40 minutes of continuous drive (no traffic jam), hot weather (about 27 C degrees, 80 F), battery showing 7 lines.

Even when I try to enter EV mode I am not allowed.

Please see some pictures below. All 3 made when stopped. In the past the ICE was off in these conditions.

Maybe the ventilation of hybrid system is bad ? I see no other explanations.

I am looking forward to your answer.

Dan

 

Thank you both!

I know the stages And I know I have to wait 10 seconds for the ICE to stop. But îs keeping running for at least 3-5 minutes.

12 V battery replaced 2 months ago, I have measured myself 1 week ago And îs ok.

Îs something else.

Dan

 

Hello Bisco,

I have checked the 12 V battery this morning, after 6 hours the car was parked and the measurement was 12.55 V.

 

Hello nh70,

After starting the car this morning I have counted about 2 minutes until the ICE stopped, so seems to be ok.

Yesterday evening I have parked and the ICE was running (after 20 minutes ride). I was curious when ICE will stop and after 15 minutes was still running.

Will do today the 12 V disconnection and check the level of coolant in the radiator and look after a mini VCI.

Dan

 

One more thing that might be a hint:

I noticed that even if I park and the ICE is still running, if I turn of the car and come back in 15 -20 minutes (like after a short shopping visit), I start the car again and then I immediately enjoy few minutes the golf cart mode.

So is entering in S4 but only after being shut down for a while.

 

Thank you.

When this is happening I am not using A/C, in fact I am using it very seldom, only when temperatures goes over 35 Celsius (95 F). Even when I run it, the a/c seems to be efficient, no problems like not enough cooling or too long waiting for cooling.

Vent of hybrid system not blocked, but, as I have some dogs I used to keep in the back, maybe in 6 years, some fur might get inside the fans. I will check this too.

 

indeed Mendel,

Only after I post the title I realized : " running when stopped "

Dan

 

Hello,

up to now I did the following:

- cleaned battery fan (I thought will find there lot a fur, but no, just dusty)
- disconnected the 12 V for few minutes
- checked the coolant level in the radiator (not only in the bottle) - it was full

After doing all these above still having ICE running when parked.
I will receive the mini VCI at the beginning of September, looking forward to see the output of this.

I will check spark plugs, air filter, clean maf sensor, throttle body, collar for air filter - need to learn a little before reaching them.

Dan

 

Hello bisco,

I have 121.000 km = 75.000 miles
I didn't watch the MPG too closely, I was focus to see when the ICE was stopping (when parked, when stopped at traffic light, when gliding) and I noticed that ICE still running too much.

Now, after the 12 V disconnection I have only 93 km (57 miles) and a consumption of 5.7 liters per 100 km (41.27 MPG). It is a good value indeed - I remember the average some weeks ago was 35 MPG.

I will see how MPG is changing in the future - 57 miles is quite a small distance to judge.

Anyway, the ICE is still running when parked after 40 minutes drive, battery having 5-6 lines, no A/C, warm outside - which is not normal. I notice this started to happen after I left the car in service once, but only for a painting of the front bumper - shouldn't have any interference.
Since then I asked also for a hybrid system check and all was ok.
I will post here the hybrid system check - done one month ago.

I am looking forward for the mini VCI, maybe this will tell me more.