I have never taken our Nexon below 25% and my belief basis other inputs is not to drain the battery if possible. So far, touch wood, no issues of any sort, 14th month and 8100kms later. Except a pair of front tyres that collapsed in the first 2500kms and a shoddy job for the home 3.3 connection.
My hunch is that cars of visibly gullible customers are used as spare part bins. There was a sea change in the dealer attitude after I started going myself, instead of via pickup/drop or via the spouse, and let the dealer workshop know that I had been driving EVs since late '90s.
One more point - service and warranty repairs are best done at the non-selling dealer. Multiple reasons for this.
Good luck. Hope TaMo does not lose goodwill of early adopters. I know two people who have moved on from Nexon EV to other EV brands quietly. We may be doing the same soon. Sad, but true, no other reason than after sales dis-service.
TataEV is digging their own grave by not providing good customer service for an advanced product like electric vehicles. Hopefully their actions yield results soon.
So one generic error message for multiple possible errors
Even the Reva electric car company showed different error codes in 2013 in the e2o.
This is problem with Tata, Mahindra who have sold electric cars using imported components and when diagnosing issues they just replace components and hope it solves the issue. The root cause is not known.
The Reva electric car company in 2012, 2013 had a more local component ecosystem which ensured more control on repairs. But ofcourse once Mahindra took over they destroyed every advance made by the Reva team. And in 2023, here we go taking 5 steps backward.
Thanks Kamlesh for your comments. Using imported components isn't a problem. If the CXOs actually used their cars before they starting selling to us, they would've faced these issues and hopefully figured out a fix. HVCE is an error happening for atleast a year now. I maybe wrong about the timeline, it could actually be even longer than that.
Agree on the testing part. The Tiago needed 8-10 months of testing maybe.
But if the error is being thrown by these imported components and the RnD team has no clue on what is to be done shows me that they are operating in the dark here. Replacing components and hoping things work is not solving the root cause. Serious investment needs to happen in development of software and tools for service personnel to accurately diagnose issues.
Another pain point is that there are so many 'tips' and 'tricks' floated in various community groups. You wouldn't know which one to follow and there's no sound explanation around it. TataEV should put out their SOPs in the public and educate their service personnel to propagate the message further among users.
One of the weirdest tips/tricks is to disconnect the 12V aux battery and re-connect it after 10-15 minutes. All this does is wipe out the errors, not fix them, which makes things worse. Avoidable.
One safe practice I follow is to hard reset the Harman system very often. I use it only as a radio. That open USB port and constant blue-tooth pairing risks are both unhealthy. Since we do not get OTA Updates for anything in our Nexon EVs, there is a 6-month gap (service interval) between updates - and that too, if the Service Centre is able to update a specific EV correctly.
Hey. I got the same error thrice on my 2020 Nexon EV. On both occasions it was after wading through flooded roads (it came repeatedly). I was getting the error on down slope specifically during the first time. Finally I had to diagnose it myself and instructed the service person to check the HV cable and connector. While the pack may be IP67 rate, often the weak points as cable connector and cables themselves.
On the third occasion, I was clueless why it happened. It got fixed after I removed the 12V battery and put it back. Basically reset the faults.
Oh wow. Thank you for sharing. It can be quite frustrating to understand why this happened the third time. Have you tried asking the service centre on how to avoid this problem in the future? I would still recommend getting it checked at the service centre. They might be able to help.
Call me cynical, but I don't have much faith. The EV specialist didn't know the difference between kW and kWh. I bought this as an early adopter knowing to expect such things. Even during my first test drive, when asked why regen is not happening, they said probably a glitch in the power graph software on dashboard. Half way through the test drive, I realised that I had started at 100% SoC and hence regen was not happening.
Oh dear. The EV dealerships have a lot of ground to cover in terms of education. The TATA dealerships, even in 2023, aren't aware of the know hows and what all to say to EV customers.
Such transparent and detailed reporting is what is needed to actually understand the real problems and the take steps to overcome them. Thank you
Thank you Chinmay. Hopefully TataEV takes notice and fixes things.
Thanks Priyans! Keep up the good work. May God bless you!
Thanks Sanjeev
I have never taken our Nexon below 25% and my belief basis other inputs is not to drain the battery if possible. So far, touch wood, no issues of any sort, 14th month and 8100kms later. Except a pair of front tyres that collapsed in the first 2500kms and a shoddy job for the home 3.3 connection.
My hunch is that cars of visibly gullible customers are used as spare part bins. There was a sea change in the dealer attitude after I started going myself, instead of via pickup/drop or via the spouse, and let the dealer workshop know that I had been driving EVs since late '90s.
One more point - service and warranty repairs are best done at the non-selling dealer. Multiple reasons for this.
Good luck. Hope TaMo does not lose goodwill of early adopters. I know two people who have moved on from Nexon EV to other EV brands quietly. We may be doing the same soon. Sad, but true, no other reason than after sales dis-service.
And also, thanks for your posts!
Thank you for your comments.
TataEV is digging their own grave by not providing good customer service for an advanced product like electric vehicles. Hopefully their actions yield results soon.
So one generic error message for multiple possible errors
Even the Reva electric car company showed different error codes in 2013 in the e2o.
This is problem with Tata, Mahindra who have sold electric cars using imported components and when diagnosing issues they just replace components and hope it solves the issue. The root cause is not known.
The Reva electric car company in 2012, 2013 had a more local component ecosystem which ensured more control on repairs. But ofcourse once Mahindra took over they destroyed every advance made by the Reva team. And in 2023, here we go taking 5 steps backward.
Thanks for documenting this Priyans.
Thanks Kamlesh for your comments. Using imported components isn't a problem. If the CXOs actually used their cars before they starting selling to us, they would've faced these issues and hopefully figured out a fix. HVCE is an error happening for atleast a year now. I maybe wrong about the timeline, it could actually be even longer than that.
Agree on the testing part. The Tiago needed 8-10 months of testing maybe.
But if the error is being thrown by these imported components and the RnD team has no clue on what is to be done shows me that they are operating in the dark here. Replacing components and hoping things work is not solving the root cause. Serious investment needs to happen in development of software and tools for service personnel to accurately diagnose issues.
Another pain point is that there are so many 'tips' and 'tricks' floated in various community groups. You wouldn't know which one to follow and there's no sound explanation around it. TataEV should put out their SOPs in the public and educate their service personnel to propagate the message further among users.
One of the weirdest tips/tricks is to disconnect the 12V aux battery and re-connect it after 10-15 minutes. All this does is wipe out the errors, not fix them, which makes things worse. Avoidable.
One safe practice I follow is to hard reset the Harman system very often. I use it only as a radio. That open USB port and constant blue-tooth pairing risks are both unhealthy. Since we do not get OTA Updates for anything in our Nexon EVs, there is a 6-month gap (service interval) between updates - and that too, if the Service Centre is able to update a specific EV correctly.
https://us.norton.com/blog/mobile/bluetooth-security
Yeah, the disconnecting and reconnecting 12V battery is often propagated as a sureshot way to fix your car if it shuts down. Pretty unsafe.
Hey. I got the same error thrice on my 2020 Nexon EV. On both occasions it was after wading through flooded roads (it came repeatedly). I was getting the error on down slope specifically during the first time. Finally I had to diagnose it myself and instructed the service person to check the HV cable and connector. While the pack may be IP67 rate, often the weak points as cable connector and cables themselves.
On the third occasion, I was clueless why it happened. It got fixed after I removed the 12V battery and put it back. Basically reset the faults.
Oh wow. Thank you for sharing. It can be quite frustrating to understand why this happened the third time. Have you tried asking the service centre on how to avoid this problem in the future? I would still recommend getting it checked at the service centre. They might be able to help.
Call me cynical, but I don't have much faith. The EV specialist didn't know the difference between kW and kWh. I bought this as an early adopter knowing to expect such things. Even during my first test drive, when asked why regen is not happening, they said probably a glitch in the power graph software on dashboard. Half way through the test drive, I realised that I had started at 100% SoC and hence regen was not happening.
Oh dear. The EV dealerships have a lot of ground to cover in terms of education. The TATA dealerships, even in 2023, aren't aware of the know hows and what all to say to EV customers.
Some dealerships have been floating this random unsigned document about 'the recommended dos and don'ts'. Here's my take on it - https://x.com/ExpWithEVs/status/1723203647860085169?s=20