I bought my Model S P85D in December 2014, and for the first two years, it worked fine without any major issues. However, starting from March 2017, it started to have random yet serious problems. The car would randomly generate critical errors, displaying multiple error messages while losing most of its driving power (a.k.a., entering “limp mode”). When this happens, the driver has to do emergency pullovers onto road shoulders and restart the main computer to make the car drivable again.
Needless to say, this is both annoying and dangerous, so I contacted Tesla right away. This turned out to be a serious problem that Tesla has been unable to fix. In the next five and a half years, for this problem alone, my Tesla has been in the service centers for 11 times, a total of 397 days.
As of January 2023, the following components had been replaced: onboard charger, charger door, MCU, various harnesses, HV battery, inverter, THC, Monocam, etc. However, the problem just keeps coming back.
The problem seems to be related to battery charging and re-gen; the following factors seem to contribute to the likelihood of it happening:
Any idea or suggestion would be very much appreciated.
Needless to say, this is both annoying and dangerous, so I contacted Tesla right away. This turned out to be a serious problem that Tesla has been unable to fix. In the next five and a half years, for this problem alone, my Tesla has been in the service centers for 11 times, a total of 397 days.
As of January 2023, the following components had been replaced: onboard charger, charger door, MCU, various harnesses, HV battery, inverter, THC, Monocam, etc. However, the problem just keeps coming back.
The problem seems to be related to battery charging and re-gen; the following factors seem to contribute to the likelihood of it happening:
- Driving right after a full charge
- The first 20 minutes drive after a recharge is the most vulnerable
- Normal re-gen (vs. low re-gen)
- The number of times power transitioned from Power to Regen mode
- Sports/insane mode (vs. chill mode)
- Complicate traffic or road conditions make it more prone to having this problem.
Any idea or suggestion would be very much appreciated.