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Dead in the driveway - “power reduced”

Sacramento

2021 Tesla Model Y LR AWD
Mar 13, 2021
50
73
Sacramento, CA
I was leaving a friend’s house in Palm Springs in my 2021 Y today and got a “reduced power” warning with a turtle icon. I had nearly 200 miles of range. All systems seemed to be working but the car rolled about 20 feet and then just stopped.
3F3B32C7-3281-452A-9433-169FEB852CCD.jpeg
01B51A3F-D909-4E9A-9F3D-C37AB9F85CAB.jpeg
Tesla roadside assistance had me power down and reboot but the problem remained.

Fortunately there’s a Tesla service center nearby in Cathedral City. I suppose there are worst places to be stranded than Palm Springs in April.
 

jcanoe

Active Member
Oct 2, 2020
3,228
3,202
Maryland
You should be aware that when a Tesla vehicle has to be towed to a Tesla Service Center that the vehicle is supposed to be evaluated by a service technician within 24 hours, so Monday COB or possibly Tuesday AM. I would open a service request via the Tesla app on your phone if one has not already been opened. Provide a brief description of what happened in the service ticket. Politely request a loaner vehicle (loaner vehicles are sometimes available) or a rental (Uber credits won't cut it if you have to drive back home.) Make sure that your mobile phone number and email are up to date in your Tesla account. Tesla prefers to use text messaging in their customer communications. The Tesla Service Center will use email to communicate if the Tesla secure message server is unavailable.
 

Sacramento

2021 Tesla Model Y LR AWD
Mar 13, 2021
50
73
Sacramento, CA
Update on the dead Tesla, Tuesday Apr. 27: I was hoping for a simple software fix but the morning after my three-month-old Tesla Y was taken to the local service center (yesterday) the service advisor called me to say the cause of the failure was a faulty wiring harness. They did not have a replacement in stock and couldn't say when one would arrive. Damn. 500 miles from home and my car was going nowhere. Joe, the service guy, set me up with a Tesla S loaner with free supercharging for as long as it takes to complete the repair. I'm back home in Sacramento now facing a one-thousand-mile round trip to pick up my car in the coming days/weeks. Am I thrilled? No. But I feel like Tesla handled my situation appropriately.
tesla loaner burbank.jpg
 

Pianewman

Active Member
Oct 28, 2020
1,369
930
Fort Worth
Tough call on returning your car. I could see it both ways. HUGE inconvenience to you.

More important, though, is do you WANT to pick up your car and then drive it 500 miles after repair? How much disassembly is required to replace the defective harness? I'm always on alert for several hundred miles after any significant repair on ANY car. Even the best techs can make a mistake.

Keep us updated. Sorry for your ordeal.
 
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Sacramento

2021 Tesla Model Y LR AWD
Mar 13, 2021
50
73
Sacramento, CA
Good point! The truth is, the drive from Sacramento to Palm Springs across the high desert of the eastern Sierra is spectacularly beautiful and it's always a joy in good weather. It's also extremely remote between the small towns along the way. I did wonder what would have happened if my Y had choked in the middle of nowhere. I also discovered an older Model S doesn't have the range of my Y and apparently can't take full advantage of the 250 kW chargers along the way. I needed to stop FIVE times at superchargers between Cathedral City (Palm Springs) and Sacramento. A normal nine-hour drive took 12 hours.
 

alexcue

Member
Aug 5, 2020
371
236
Los Angeles
I'm wondering if a mouse got into the wiring? Heard of others having issues with the little critters. Just a thought...

Let us know how this finally resolves its self.
 

Sacramento

2021 Tesla Model Y LR AWD
Mar 13, 2021
50
73
Sacramento, CA
I think the service advisor mentioned a crack in one of the connectors. He said they could have hot-wired it to make the car go, but it would be against Tesla policy. I totally support that. He also said his crew hadn't seen many of these (if any).
 

2101Guy

Active Member
Jan 6, 2020
2,046
2,538
USA
Good point! The truth is, the drive from Sacramento to Palm Springs across the high desert of the eastern Sierra is spectacularly beautiful and it's always a joy in good weather. It's also extremely remote between the small towns along the way. I did wonder what would have happened if my Y had choked in the middle of nowhere. I also discovered an older Model S doesn't have the range of my Y and apparently can't take full advantage of the 250 kW chargers along the way. I needed to stop FIVE times at superchargers between Cathedral City (Palm Springs) and Sacramento. A normal nine-hour drive took 12 hours.
possibly one of the model S's with the much older battery pack where via software, Tesla reduced range and increased charge times. Or a S with a 60 or 60 battery pack (less range)
 

CapsEngineer

Member
Nov 28, 2020
128
102
Maryland
Hmmm, that statement implies to me that they may have seen others. Wondering if it was a manufacturing fault since the car is so new.

Could be a manufacturing fault, but not necessarily Tesla's. If they contract out to someone to manufacture wiring harnesses, that's where the problem could be. I know that at work we have had this problem multiple times. Sometimes we have to do 100% acceptance testing at the subcontractors site while we work with them to fix the problem.
 

Silicon Desert

Active Member
Oct 1, 2018
3,598
3,493
Sparks NV / GF 1
Could be a manufacturing fault, but not necessarily Tesla's. If they contract out to someone to manufacture wiring harnesses, that's where the problem could be. I know that at work we have had this problem multiple times. Sometimes we have to do 100% acceptance testing at the subcontractors site while we work with them to fix the problem.
yes, agree. I didn't say it was Tesla's possible manufacturing fault, yet good to clarify for folks.
 
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Sacramento

2021 Tesla Model Y LR AWD
Mar 13, 2021
50
73
Sacramento, CA
Dead on the driveway update: I returned to Cathedral City (Palm Springs) yesterday, May 3, to pick up my Tesla Y. The service center rep says similar failures in other Teslas have been caused by rodents chewing wires, but there was no evidence of such damage in my case.

The following parts were required to get it running again:

Parts Ordered
  1. ASY,HARN,RR SUBFRAME,COIL,NA
    Part #: 1989059-01-A
    Order Date: April 26, 2021
  2. BOLT,HF,M14-2.0x120,[109],ZNFL,CMAT
    Part #: 1461657-00-A
    Order Date: April 26, 2021
 

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