Red Ring, no power, thunking rough sound while coasting to stop

[ObiWanSotti]

It's happened 3 times now. In all 3 instances once I brought the car to a complete stop I could power down and back on without really waiting any length of time and the car would power back up and appear healthy.

The first was something I can chalk up to gremlins.

The 2nd time was ~13 days ago and then it happened a 3rd time yesterday, so now I'm going to have to take it it in.

What should I know before I take it to the the dealership. I've got an ODB2 reader so I can pull codes, but any idea on what to look for would be great. For whatever reason I'm not entirely sure I trust the dealer, and I want to be armed with as much information as possible. I bought the car used from a porsche dealer it wasn't a certified pre-owned but I got the porsche extended warranty coverage.

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[chun]

Transmission is probably fucked; and would imagine it happens every now and again when switching from 1st to 2nd gear.

You should do nothing before you take it to the dealership... They can see the error codes. Send them pics/videos of the error on the dash, and then they are oblidged to check it.

 

[ObiWanSotti]

It drove home after the this last incident, the dash currently looks fine when I power it up.

 

[Dee]

So what does the OBD readout say?

 

[gamueller]

It's happened 3 times now. In all 3 instances once I brought the car to a complete stop I could power down and back on without really waiting any length of time and the car would power back up and appear healthy.

The first was something I can chalk up to gremlins.

The 2nd time was ~13 days ago and then it happened a 3rd time yesterday, so now I'm going to have to take it it in.

What should I know before I take it to the the dealership. I've got an ODB2 reader so I can pull codes, but any idea on what to look for would be great. For whatever reason I'm not entirely sure I trust the dealer, and I want to be armed with as much information as possible. I bought the car used from a porsche dealer it wasn't a certified pre-owned but I got the porsche extended warranty coverage.

Blown transmission for two hundred

 

[ObiWanSotti]

Blown transmission for two hundred

I would think that power cycling the car and having normal behavior would be something other than a transmission. What makes you think it's the transmission?

 

[ObiWanSotti]

The iOS Car Scanner app gave me this:
Not sure what's actually relevant in there.

Gonna try with the MapEV software tomorrow.

 

[gamueller]

I would think that power cycling the car and having normal behavior would be something other than a transmission. What makes you think it's the transmission?

It's the transmission thunking as it downshifts 2-> 1

 

[ObiWanSotti]

It's the transmission thunking as it downshifts 2-> 1

Would that mean driving it in sport+ mode would be recommended since it'll start in 1st and only downshift under deacceleration (without a load)?

in regular modes it starts in 2nd and only kicks down when you ask for power right?

You're saying kicking down under power is what is failing? All three times were at relatively low speeds, twice in bumper to bumper type traffic and once pulling away from a green light.

 

[GREATST]

Let us know what happens.....

 

[freinando]

I had the 44085 error before. Inverters replaced. See this thread.

 

[r553]

It is likely the front inverter. There is a current sensor in there that is failing. I would not clear the codes so the dealer has something to work with. I had this issue once. The dealer wouldn't do anything about until it happened again. So far it is behaving itself. I did have to have the rear motor replaced after showing the dealer all the codes I was seeing with my Foxwell i70BT scanner. Thankfully I had a warranty. Good luck.

 

[ObiWanSotti]

I've got the VSP warranty, not a CPO, and it went in the shop last wednesday.

The quote from the service advisor was:

We are going to be recommending the power electronics to the extended warranty. I'm going to reach out to them next and update you again after I speak with them. Very likely will be something they will want to send one of their inspectors for prior to approval. Pretty normal process for extended warranty companies

Fingers crossed it comes back good as new.

 

[ObiWanSotti]

Sounds like the repair is approved and the it's next up in the shop.

I still don't have any more details than "power electronics", but they said the repairs are >$10K w/o warranty, so that one paid for itself.

I'll have the full details when I get the receipt, but probably won't be back home until the week of the 6th.

 

[fsolis]

I experienced something very similar. My car shut down three times while driving on the highway, on three separate occasions over the span of two months. Porsche ended up replacing both the front and rear power electronics under warranty (mine was a CPO vehicle), as well as the 12V battery. The battery replacement was surprising since it’s a LiFePO battery and should typically last well over 10 years.

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