2022 GTPE Loss of Range/Efficiency

[JustBob]

Something happened about a month ago and my range/efficiency has dropped severely. I've never watched the miles/kwh too closely before, but believe it's normally 2.5 - 3.0. This is my 2nd winter so I know the range drops when it's cold. However I'm seeing 0.9-1.7 miles/kwh. This past Monday I left with 90% charge and after about 70 miles the car went into red turtle mode and I had to limp home. I've been to the dealer twice and they say nothing is wrong. I wish this happened in the summer because they've said both times that the cold affects the range. Does anyone have any ideas?

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[Tomatoboy]

What were the outdoor temps?

 

[JustBob]

What were the outdoor temps?

I'm in Wisconsin so it's been anywhere from 10-40 degrees. So I agree that will impact range. But not to this degree (excuse the Pun).

 

[music_cities]

That seems extreme. Check the headwind, whenever I've had terrible electricity use it's been because of wind. The other possibility is that you are driving a lot faster this year?

Also, what does the trip meter say your percentage of use on cabin heat and accessories is?

 

[dalola]

Yeah, that does seem excessive. It was 15 degrees here yesterday, and we were getting about 2 mi/kWh on the highway, heater blasting away. But light wind, only wife & I in the car. Were you excessively loaded, or have a strong headwind? Speeding above 80? All factors...

 

[JustBob]

That seems extreme. Check the headwind, whenever I've had terrible electricity use it's been because of wind. The other possibility is that you are driving a lot faster this year?

Also, what does the trip meter say your percentage of use on cabin heat and accessories is?

Trip meter is ypically 90-95% driving. My commute is about 40 miles each way, so pretty consistent. Car has about 32k miles in 2 years, so I have a good feel for the car. Something is just wrong.

 

[JustBob]

Yeah, that does seem excessive. It was 15 degrees here yesterday, and we were getting about 2 mi/kWh on the highway, heater blasting away. But light wind, only wife & I in the car. Were you excessively loaded, or have a strong headwind? Speeding above 80? All factors...

Yes, when really cold I would expect around 2.0. That's why 0.9 - 1.7 in moderate (30-40 degree) weather is so alarming to me.

 

[music_cities]

Trip meter is ypically 90-95% driving. My commute is about 40 miles each way, so pretty consistent. Car has about 32k miles in 2 years, so I have a good feel for the car. Something is just wrong.

Another thing to check is if you're pre-conditioning your battery and cabin, restart the trip meter when you actually start driving. I've noticed sometimes that the energy used to preheat the cabin and preheat the car's battery gets included in my trip consumption. It can really jack up the metrics on shorter trips, because it uses quite a bit of electricity to precondition while plugged in.

After skiing I have a drive downhill from the parking lot to the highway that's net negative, but sometimes it was showing as actually using electricity. But, it was because I was starting the car and letting it "idle" while I was descending my last runs of the day, and loading up my gear.

 

[ack154]

Even in the coldest temps, there's no way you should be getting into turtle mode after 70 miles. What did the range estimate say at that point? Was it saying you're nearly empty or were there some miles left?

Definitely sounds like something is wrong based on that... but it would be hard to say without more info or some trouble codes or something.

 

[Sikkun]

Turtle mode after 70 miles does not sound right.

 

[dalola]

Yeah, that makes no sense either...even if you realistically estimate a super low 150 mile range to start the trip, turtle mode should not have kicked in after only 70 miles. OP, is your dealer's service dept well regarded, because it sure sounds like they are missing something.

 

[Snakebitten]

I'd be curious what a couple of PIDs (Carscanner app) for battery temperature state.

And then I'd precondition using the EVSE and confirm those same battery temperatures went significantly up.

That would at least confirm what portion of the drop in range actually is temperature related.

Then there are PIDs for lowest voltage cell, average voltage cell, highest voltage cell. You would be looking for the delta (difference) between lowest voltage cell and average voltage of cells. It needs to be VERY small for the battery to provide expected range. Or put another way, if you have just one cell that is injured and at a lower voltage than the rest of the cells, that one weak cell determines the range of the vehicle.

 

[blueovaltech]

Last winter in my '23 GTPE, I was averaging about 1.5-1.9, 1.3 in some cases at highway speeds, heater on 78 degrees/auto, depending on wind load/ect. Really strong headwinds and temps in the 20's or lower, 1.3-1.5 was pretty normal.

My '24 is similar. 0-20 degrees F, highway speeds, 1.4-1.9 is pretty normal, running the heat at 78 or so depending on ambient temps.

That will work out to around 150 miles of range on the extreme side, not taking into account if there is battery conditioning taking place as well.

Summertime, both cars are 2.5-3.1mi/kw. Both are new with less than 10k on the odo's, for reference.

 

[Mach-Lee]

I'm in Wisconsin so it's been anywhere from 10-40 degrees. So I agree that will impact range. But not to this degree (excuse the Pun).

Willing to be you aren’t plugging in at night to keep the battery warm. Plug in and charge every night on 240V. Otherwise you’ll get turtle mode from the battery getting cold.

Software changes may be responsible for the differences in displayed efficiency.

Earlier this week when it was cold I got 1.7 mi/kWh going to work after preconditioning. That's about as bad as I see, a GT might get 1.5.

 

[Tomatoboy]

I'm in Wisconsin so it's been anywhere from 10-40 degrees. So I agree that will impact range. But not to this degree (excuse the Pun).

Hmm…that means we can assume last year was similar and you’re not just getting hit with a weird cold spell…that does sound like a peculiar drop. Are you doing anything different this year? Not preconditioning anymore? Changed chargers or charging location? Any change in tires or recent damage to vehicle that could cause drag? Any other signs of an issue that could explain it, like reduction in range even on warm days or reduced cabin heat performance?

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