Tesla Model 3 Will only charge at 24 Amps

[PlaidSpeed]

Hey guys, recently my 2018 Tesla Model 3 Long Range AWD, with 57k miles on it, will not charge above 24 Amps on my home charger. When I look at the errors in service mode, I get an error from the Power Conversion System (PCS) saying the car failed to pre charge the intermediate bus resulting in the car saying "Pre-Charge Failed Boost". I talked with Tesla and they said to replace the PCS which would cost about 2k, but I am fine charging at 24 amps and would rather not spend the money to have it replaced. Has anyone had this issue?

 

[chobra]

Hey guys, recently my 2018 Tesla Model 3 Long Range AWD, with 57k miles on it, will not charge above 24 Amps on my home charger. When I look at the errors in service mode, I get an error from the Power Conversion System (PCS) saying the car failed to pre charge the intermediate bus resulting in the car saying "Pre-Charge Failed Boost". I talked with Tesla and they said to replace the PCS which would cost about 2k, but I am fine charging at 24 amps and would rather not spend the money to have it replaced. Has anyone had this issue?

Seems like this person was able to get their PCS covered under warranty

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Power Conversion System (PCS) failure

That mistake is now coming back around to bite them in the arse, yet they're trying to pass the hefty cost on to the owners rather than admit that the HV Battery Service Panel is an integral, essential part of the HV Battery System under warranty. I will say for anyone filing an arbitration...

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PSA - When PCS is serviced, check Rear safety belts are bolted back in

IF YOU HAD YOUR PCS SERVICED, CHECK THAT YOUR SEAT BELTS ARE BOLTED INTO THE CAR The PCS failed on my 2023 Model 3 on day ~5 of ownership. The car was towed to the service center as it was not drive-able, and Tesla fixed it about a week later. During the fix, the techs apparently forgot to...

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[rrolsbe]

Hey guys, recently my 2018 Tesla Model 3 Long Range AWD, with 57k miles on it, will not charge above 24 Amps on my home charger. When I look at the errors in service mode, I get an error from the Power Conversion System (PCS) saying the car failed to pre charge the intermediate bus resulting in the car saying "Pre-Charge Failed Boost". I talked with Tesla and they said to replace the PCS which would cost about 2k, but I am fine charging at 24 amps and would rather not spend the money to have it replaced. Has anyone had this issue?

I think this could be more serious than only being to charge at 24A with your level 2 EVSE. Unlike most EV manufactures, I believe Tesla uses a DC-to-DC boost converter located on the PCS board along with the 12V battery to step up the DC voltage to the HV pack level before closing the main contactors. If anyone has more details or can confirm or correct the above please feel free to respond.

 

[PlaidSpeed]

I think you are correct. The thing is the car charges totally fine. I have no issues at all just reduced amps. The Pre charger uses the 12v to pre charge the contactors or something.

 

[PlaidSpeed]

Seems like this person was able to get their PCS covered under warranty

You will also see other related content if you use the search function on the top right

Power Conversion System (PCS) failure

That mistake is now coming back around to bite them in the arse, yet they're trying to pass the hefty cost on to the owners rather than admit that the HV Battery Service Panel is an integral, essential part of the HV Battery System under warranty. I will say for anyone filing an arbitration...

teslamotorsclub.com

PSA - When PCS is serviced, check Rear safety belts are bolted back in

IF YOU HAD YOUR PCS SERVICED, CHECK THAT YOUR SEAT BELTS ARE BOLTED INTO THE CAR The PCS failed on my 2023 Model 3 on day ~5 of ownership. The car was towed to the service center as it was not drive-able, and Tesla fixed it about a week later. During the fix, the techs apparently forgot to...

teslamotorsclub.com

Sadly I am out of warranty

 

[chobra]

Sadly I am out of warranty

I believe they were able to get it covered under the 8 year \ 120k battery warranty policy, but other cases that were denied, so it comes down to your personal experience with your local SC

Curious what your experience is when you're at a supercharger?