gas engine coming on at low speeds with full charge?

[CarsonGrey]

I've had two episodes recently where my Clarity was in Eco mode, with a full or mostly full battery and the gas engine came on inexplicably. The first time was several weeks ago. I was stopped at a light and all of a sudden the engine came on and stayed on for a mile or two after I pulled away from the light, before switching off and back into EV mode. As it should have never come out of EV mode while stopped, much less on a full charge, I had the dealer look at it and they ran a diagnostic and checked Honda's internal forums and found nothing.

This afternoon, I floored it up a small hill in Eco mode kind of just playing around and the engine kicked in, as expected. But then it wouldn't go off. For the next 15 minutes, the car would not flip back into EV mode, even though I was driving 35 mph in Eco mode with 75% battery charge and using the regen paddles. Finally, when I thought I was going to have to pull over and turn the car off and then on again, it suddenly switched back to EV mode and then worked fine for the rest of the drive home (15 miles).

Thoughts? Similar experiences?

 

[CarsonGrey]

I've had two episodes recently where my Clarity was in Eco mode, with a full or mostly full battery and the gas engine came on inexplicably. The first time was several weeks ago. I was stopped at a light and all of a sudden the engine came on Speed Test Solitaire essay writer and stayed on for a mile or two after I pulled away from the light, before switching off and back into EV mode. As it should have never come out of EV mode while stopped, much less on a full charge, I had the dealer look at it and they ran a diagnostic and checked Honda's internal forums and found nothing.

This afternoon, I floored it up a small hill in Eco mode kind of just playing around and the engine kicked in, as expected. But then it wouldn't go off. For the next 15 minutes, the car would not flip back into EV mode, even though I was driving 35 mph in Eco mode with 75% battery charge and using the regen paddles. Finally, when I thought I was going to have to pull over and turn the car off and then on again, it suddenly switched back to EV mode and then worked fine for the rest of the drive home (15 miles).

Thoughts? Similar experiences?

thank you my issue has been solved

 

[craze1cars]

For the benefit of others who may come across this, it’s pretty normal behavior for the Clarity to do this, not an indicator of a problem.

 

[mattheo0118]

When the battery is full and you're going on a decline. The engine will kick in because the car can't Regen anymore electricity into the battery.

 

[JCA]

What you noticed the second time (bar going white and car going in and out of EV mode for 15-20 minutes) is likely a "system check" that the car does every few weeks. It is a bit opportunistic; if it's been a couple weeks since the last one and the engine comes on for other reasons (e.g. flooring it or regenerating with full battery), it'll do the system check then. After ~3 weeks if the engine hasn't run at all it can just happen even without a trigger.

 

[Philemon]

but, if the ICE start when the battery is full and we go for regen, I don't see the logic to start the ICE to empty the battery. ICE starting ask for fuel, not electron ?


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[JamesW1988]

This could be due to engine overheating.

 

[neelyang77]

For the benefit of others who may come across this, it’s pretty normal behavior for the Clarity to do this, not an indicator of a problem.

When the battery is full and you're going on a decline. The engine will kick in because the car can't Regen anymore electricity into the battery.

 

[neelyang77]

When the battery is full and you're going on a decline for phd dissertation help. The engine will kick in because the car can't Regen anymore electricity into the battery.

also, we don't know if these are bugs or normal operation, so taking it to Honda is good, but you might need to push dealer to report issue to Honda. Don't expect an immediate fix or anything.

 

[Annawhite]

I've had two episodes recently where my Clarity was in Eco mode, with a full or mostly full battery and the gas engine came on inexplicably. The first time was several weeks ago. I was stopped at a light and all of a sudden the engine came on and stayed on for a mile or two after I pulled away from the light, before switching off and back into EV mode. As it should have never come out of EV mode while stopped, much less on a full charge, I had the dealer look at it and they ran a diagnostic and checked Honda's internal forums and found nothing.

This afternoon, I floored it up a small hill in Eco mode kind of just playing around and the engine kicked in, as expected. But then it wouldn't go off. For the next 15 minutes, the car would not flip back into EV mode, even though I was driving 35 mph in Eco mode with 75% battery charge and using the regen paddles. Finally, when I thought I was going to have to pull over and turn the car off and then on again, it suddenly switched back to EV mode and then worked fine for the rest of the drive home (15 miles). faceshapeapp

Thoughts? Similar experiences?

I’d be curious if this could be related to the engine warming up or the car protecting the battery after the hard acceleration. The fact that it stayed on for 15 minutes despite having plenty of charge is definitely unusual, though. Has anyone else with a Clarity experienced the same thing after flooring it?

 

[insightman]

There are a few things that can cause the engine to run while in EV. Some of them might combine to extend the length of time the engine runs before shutting itself off.

• Pressing the accelerator past its "click" point (about 3/4 of its travel), starts the engine to give you the extra power you need
• Incomprehensible to me, the engine starts up to use up excess regen power when using the brakes with a fully charged traction battery
• When the engine has been dormant for a long time, it starts up to check things out, move some oil around, and use up some old gasoline
• In cold temperatures, the engine may come on to generate more heat than the toaster coils can deliver