MS 2013 p85 - getting intermittent error codes

[theone_]

Hi,


So i am the owner of an 2013 ms p85, wich from when i purchased it july last year has been an emotional rollercoaster.

In my short ownership the car received following repairs:
- doorhandles (all) to gen 3
- changed driverside window regulator

- changed DU to and "new" refurbished
- changed all of the suspension arms and links in the front

Due to an accident where my car was hit from the rear left side, all suspension parts on left front and back were changed out.
- the 12v battery was changed
- the speedometre screen was changed


So to the problem:

The last 2 weeks the car has been throwing error codes my way, where in the start it was every second day and now its daily.
And it starts with what i perceive sitting in the car as an small power surge/jolt followed by one or more error codes.
ESP/Stability control goes, Regen goes , sometimes antispinn, the power steering (sometimes reduced, sometimes gone).

I had one day where it just was hammering error codes (the audio chiming alarm was non-stop).

All the above is fixed when i power off the car.
How long the fix lasts is very variable, sometimes it comes back in 5-20 minutes, sometimes the next day.


I hoped long and well that perhaps the source of this could be the famous earth studs located under the frunk.
So, today i checked those, and the one on the drivers side (red ring) has been replaced and someone had put a new bolt in a new hole on the frame. Did not touch this as it looked good.

Passenger side (green ring) was the original stud, wich i took of the bolt and the ground wires, sanded all down, cleaned and remounted it.
Due to the sanding i did around the stud and on the grounding connectors i am well and sure about this side.


So - i was out this afternoon with the car and after driving 20 minutes the same error came back, this time i felt a jolt in the drive, like the car got pushed/accelerated before it stopped.


Oh, and i have had Tesla remote diagnose it, and they have asked me come to the nearest shop for an " low voltage circuit integrity check " , only problem is that the only available time is 3 weeks from now.


I have googled alot, searched this forum, but i cant quite find someone who has the same issues and error codes -->

ESP_w003_tcDisabledByFault
ESP_w002_espFaultLamp
EPAS_d076_KFC_DAS_TIMO
EPAS_d011_KFC_COMP_L2
EPAS_d010_KFC_COMP_L1


I have attached photos of the error codes:

 

[DerbyDave]

Tesla error - EPAS_d076_KFC_DAS_TIMO. Electric Power Assisted Steering EPAS use electric motors to provide the assistance.

 

[Gtech]

Sometimes there is moisture intrusion in the connectors of the steering rack, you could check that also,

Did you checked the ground for the steering rack as well? ABS and steering rack share same ground point left front

 

[brainhouston]

Seeing how u have a lot of *MIA codes in history that sounds more like CAN bus issue
Finding what could cause that is gonna be tricky...
I've seen some youtube videos where even a backup camera can take down full CANbus...
Schematics are free from Tesla Service website

 

[theone_]

Small update:

Had the car at my local Tesla workshop today, they testdrove the car and was able to reproduce the errors after some driving.

Talked to the mechanic and he stated that he found the low woltage connector on the rear drive beeing covered in Stones/sand and that an connection issue on this could be the source of the issue.

They cleaned and remounted it, I picked the car up after work and made it about 50km before the care lighter up, bigtime.

Speedometer froze up and absolutely all the systems went down, alarms constantly chiming, so now worse then before, as in all the system lamps constantly lighting up.

I made the last km's home, and was able after alot of jerking to put the car in park and put the charger on.


Have contacted my insurance as I think it could be falt related to an previous accident where the car was hit in the rear left wheel, and begged tesla to take it in again next week.


Have anyone of you had a somewhat same experience?

I have googled alot on the subject and find that there are instances where the tmps sender/receiver can go faulty and trip, taking down canbus and all systems..

 

[Dank156]

Loosen grounding cable or corroded ground stud nut ?
Ground Stud Nut

My old pre-facelift 85s gave me all sorts of errors and even intermittently loses power steering. I thought that was the end of it, but the service center found the faulty/corroded nut and "re-established" a new grounding point for the ground cable. After that, it worked for a couple of years without issues before I sold it.

 

[theone_]

Update:
I checked and rechecked all the grounding points with no positive result.

Lucky me i have an very expensive insurance so that I could have a "free" rental car at the 3 visits to my local Tesla shop during this issues.

They spent alot of hours, but all the errors came down to a spliced canbus cable located behind the speedo/little screen.

They told me that this could not be seen in connection to the fact that they previously just before my problems started had changed that very screen.