A rising number of Tesla Cybertruck owners are unable to charge at home due to failures of the Power Conversion System (PCS), the unit responsible for AC charging and converting the high-voltage battery to a 48-volt system. According to reports from owner forums, Tesla is aware of the issue and is replacing the component on a case-by-case basis, but has not issued a formal recall.
Owners describe a consistent failure pattern: home charging capacity drops first from 48 amps to 24 amps, then stops entirely within days. An "AC Charging Unavailable" warning appears, along with service codes including PCS2_a094 and PCS2_a137, with the latter pointing to a failed MOSFET health check within the converter. Mileage does not appear to be the primary trigger; failures have been reported under 10,000 miles and as high as 31,250 miles.
According to an owner poll on the Cybertruck Owners Club forum, of 223 respondents, 91 (40.8%) reported PCS failures replaced under warranty, 15 (6.7%) suspected a failure pending confirmation, and only 2 (0.9%) paid out of pocket. The fix involves a revised PCS unit and new wiring harness, requiring technicians to remove the tonneau cover, bed floor, and suspension components—a labor-intensive procedure.
For trucks still under Tesla's 4-year/50,000-mile basic warranty, PCS replacement is free. For out-of-warranty owners, repairs have cost between $5,000 and $7,200 in parts and labor. Tesla subsequently reduced the out-of-warranty price to approximately $1,000 as a "goodwill" gesture. This 80% reduction effectively acknowledges a manufacturing defect rather than customer wear.
The wait times present another challenge. Owners report that replacement PCS units are on national backorder, with service appointments delayed by weeks. Some have posted lead times of "14 days until next available appointment," with pickup dates repeatedly pushed back. Several owners have relied on Supercharging for daily charging for two months or longer.
To address the situation, Tesla released a firmware update that keeps Supercharging enabled on affected trucks even when AC charging is unavailable, and it is covering Supercharging costs for affected owners until repairs are completed. While a reasonable interim measure, relying on DC fast charging for months is not the ownership experience electric vehicles should provide.
Tesla is handling this issue with minimal transparency. The fact remains: a power-electronics component is failing on Cybertrucks at low mileage, often far sooner than any reasonable expectation for charger degradation, and Tesla is managing it quietly, truck by truck, without notifying regulators or issuing a recall. The company's own pricing strategy—reducing a $5,000–$7,000 repair to $1,000—demonstrates it recognizes this as a manufacturing defect, not normal wear. The transparent course of action would be a recall and free replacement across the entire fleet, not case-by-case handling with selective discounts.
