2018 Pacifica hybrid: Gas engine starting by itself??? - 2017+ Chrysler Pacifica Minivan Forums
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post #1 of 8 (permalink) Old 05-28-2019, 11:19 PM Thread Starter
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Thumbs down 2018 Pacifica hybrid: Gas engine starting by itself???

Happened more than couple times already, wondering if this is expected or time for a dealer visit. Here are the order of events that seem to trigger this behavior -

1 - Car fully charged (using level 2 charger)
2 - Go for a longish drive that drains all the battery and also puts some good amt of miles (20+?) on the gas
3 - Come home and plug in with 0% battery charge (to the same level 2 charger)
4 - The charge goes to about 50 and then the gas engine starts by itself and seems to run at high rpm with a loud noise (as if you gave a full gas pedal push for a gas engine while on neutral)

some combination of me un-plugging the charger, openeing the drivers door, starting the car and then stopping, closing the drivers door makes this slowly die down. Never seen this without the charger connected, btw. wtf is going on?
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post #2 of 8 (permalink) Old 05-29-2019, 10:21 PM
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I don't own a hybrid, but what you have described seems alarming.

If it was me I'd be calling a service manager at your local dealer and describe this incident and get their recommendation.

Good luck and let us know what you find out.

2019 Limited, Luxury White, HK Sound, Tow Group, Advanced Safety Tec Group
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post #3 of 8 (permalink) Old 05-30-2019, 06:25 AM
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It's probably the battery cooling fan that's running, not the engine. During a level 2 charge the fan can run very loudly (some have likened it to a jet engine) if the battery requires cooling.
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post #4 of 8 (permalink) Old 05-31-2019, 12:31 PM
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Originally Posted by shankarsv View Post
Happened more than couple times already, wondering if this is expected or time for a dealer visit. Here are the order of events that seem to trigger this behavior -

1 - Car fully charged (using level 2 charger)
2 - Go for a longish drive that drains all the battery and also puts some good amt of miles (20+?) on the gas
3 - Come home and plug in with 0% battery charge (to the same level 2 charger)
4 - The charge goes to about 50 and then the gas engine starts by itself and seems to run at high rpm with a loud noise (as if you gave a full gas pedal push for a gas engine while on neutral)

some combination of me un-plugging the charger, openeing the drivers door, starting the car and then stopping, closing the drivers door makes this slowly die down. Never seen this without the charger connected, btw. wtf is going on?
Hi shankarsv,
We recommend having your dealer look into this for you. If you would like any additional assistance, please feel free to send us a private message and we'll be happy to help!
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post #5 of 8 (permalink) Old Yesterday, 12:45 PM
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I agree with the post above - that it is probably the charging cooling fan - which is very loud and variable speed/sound. My hybrid does this a lot during charging - especially when it is very hot in my garage.
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post #6 of 8 (permalink) Old Yesterday, 02:44 PM
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Originally Posted by shankarsv View Post
4 - The charge goes to about 50 and then the gas engine starts by itself and seems to run at high rpm with a loud noise (as if you gave a full gas pedal push for a gas engine while on neutral)
Mine does this every time. It is NOT the engine starting, it is the coolant fan running pulling the heat from the battery coolant. Level 2 charging produces a lot of heat. Also various times during the charge cycle the fan comes on at lower speeds as well.

This is normal operation.

2018 Pacifica Hybrid Limited Platinum. Build date 08/18. Velvet red/alloy. 18" wheels. Fully loaded with every available option.

Last edited by ThisSuckersElectrical; Yesterday at 08:38 PM.
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post #7 of 8 (permalink) Old Yesterday, 02:45 PM
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Quote:
Originally Posted by thclimer View Post
I don't own a hybrid, but what you have described seems alarming.

If it was me I'd be calling a service manager at your local dealer and describe this incident and get their recommendation.

Good luck and let us know what you find out.
This is not alarming. The engine is not starting, and this is normal charging operation via a level 2 charger.

2018 Pacifica Hybrid Limited Platinum. Build date 08/18. Velvet red/alloy. 18" wheels. Fully loaded with every available option.
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post #8 of 8 (permalink) Old Yesterday, 03:48 PM
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I agree, everything is warm enough that battery cooling is required and fans actuate during charge process.
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