--- title: "Tesla PCS_a019 / PCS_a016: AC Charging Limited Fix | EV Fix Guide" description: "PCS_a019 means AC (home or destination) charging has been slowed by power-quality problems from the outlet, Wall Connector or grid, or by a fault in the car's onboard charger. PCS_a016 is the same problem severe enough to stop AC charging. Supercharging still works. Tesla Service: $0. Independent: $150 - $500. DIY steps, tools and torque specs included." canonical: https://evfixguide.com/guides/pcs-a019-ac-charging-limited lang: en last_updated: 2026-10-24 --- [Tesla Model 3](https://evfixguide.com/models/model-3) · [Tesla Model Y](https://evfixguide.com/models/model-y) · [Tesla Model S](https://evfixguide.com/models/model-s) · [Tesla Model X](https://evfixguide.com/models/model-x) · [Tesla Cybertruck](https://evfixguide.com/models/cybertruck) Charging & Range DIY possible # Tesla PCS_a019 / PCS_a016: AC Charging Limited Fix By the EV Fix Guide editorial team · Updated October 24, 2026 · [How we estimate costs](https://evfixguide.com/about#how-we-estimate-costs) ## Quick answer PCS_a019 means AC (home or destination) charging has been slowed by power-quality problems from the outlet, Wall Connector or grid, or by a fault in the car's onboard charger. PCS_a016 is the same problem severe enough to stop AC charging. Supercharging still works. At a Tesla Service Center this typically costs **$0 (if equipment-side) / $1,500 - $3,000 (Onboard charger / PCS replacement)**. An independent shop charges about **$150 - $500 (Electrician: outlet or circuit repair) / $900 - $2,000 (PCS repair)**, and doing it yourself costs **$0 - $50 (Testing; replacement outlet adapter)** — potential savings of **40% - 70%**. DIY difficulty: easy (15 - 30 Minutes). ![PCS_a019 / PCS_a016: Power Grid or Vehicle Issue Limiting AC Charging](https://evfixguide.com/assets/images/v4-supercharger.jpg) ## Symptoms - 'Power grid or vehicle issue limiting AC charging - Unplug and retry' alert (PCS_a019) - 'Cannot charge - Poor grid power quality possible' alert (PCS_a016) - Home charging much slower than usual, or stopping and restarting - Supercharging works normally while AC charging does not ## Repair cost: Tesla vs independent shop vs DIY | Option | Typical cost (USD) | | --- | --- | | Tesla Service Center | $0 (if equipment-side) / $1,500 - $3,000 (Onboard charger / PCS replacement) | | Independent shop | $150 - $500 (Electrician: outlet or circuit repair) / $900 - $2,000 (PCS repair) | | DIY | $0 - $50 (Testing; replacement outlet adapter) | | Potential savings | 40% - 70% | Ranges are US estimates compiled from owner reports and shop quotes; prices vary by region, model year and parts availability. Report your price. ## Can an independent shop fix it? Most cases are fixed by an electrician, not a car mechanic: a loose or overheated outlet, a worn Mobile Connector adapter, or a Wall Connector wiring fault. If the alert follows the car to several different chargers, the onboard charger (part of the PCS) is the suspect, and some independent EV shops can repair or replace it. [Get matched with an independent shop →](https://evfixguide.com/?shop=pcs-a019-ac-charging-limited#find-shop-section) ## How to fix it yourself (easy, 15 - 30 Minutes) The DIY part is isolating the cause: try a different outlet, different equipment and a Supercharger. Do not open the Wall Connector or the outlet yourself unless you are qualified; call an electrician if the problem is on the house side. ### Tools you need - A second outlet or charging location to test with - Infrared thermometer (optional, to spot a hot outlet or plug) ### Steps 1. Check for a second alert that names the specific problem. Tesla says to investigate that one first. 2. Unplug, wait a minute and plug back in. If the alert clears and does not return, it was a short power disturbance. 3. If you use a Mobile Connector, try a different wall outlet on a different circuit. If it charges normally, the original outlet or its wiring is the problem. 4. If you use a Wall Connector, try a Mobile Connector on a separate outlet. If that works, the Wall Connector or its circuit is the problem. 5. Feel the plug and outlet after 30 minutes of charging (or use an IR thermometer). A hot, discolored or melted outlet must be replaced by an electrician before you charge on it again. 6. Turn off big loads on the same circuit (dryers, heaters, compressors) and retry. Heavy nearby appliances can cause the disturbance. 7. If the alert appears at several different locations and on different equipment, book service for the onboard charger. **Pro tip:** Tesla's own manual says PCS_a019 is often caused by the outlet, Wall Connector or grid rather than the car. Test at a second location before paying for a car repair. ## Frequently asked questions ### How much does it cost to fix a PCS_a019 charging alert on a Tesla? Tesla Service Center: $0 (if equipment-side) / $1,500 - $3,000 (Onboard charger / PCS replacement). Independent shop: $150 - $500 (Electrician: outlet or circuit repair) / $900 - $2,000 (PCS repair). DIY: $0 - $50 (Testing; replacement outlet adapter). Typical savings versus the service center: 40% - 70%. ### Can I fix a PCS_a019 charging alert myself? Yes. DIY difficulty is easy and it typically takes 15 - 30 Minutes. The DIY part is isolating the cause: try a different outlet, different equipment and a Supercharger. Do not open the Wall Connector or the outlet yourself unless you are qualified; call an electrician if the problem is on the house side. ### Can an independent shop fix a PCS_a019 charging alert instead of Tesla? Yes. Most cases are fixed by an electrician, not a car mechanic: a loose or overheated outlet, a worn Mobile Connector adapter, or a Wall Connector wiring fault. If the alert follows the car to several different chargers, the onboard charger (part of the PCS) is the suspect, and some independent EV shops can repair or replace it. ### Which Tesla models are affected by a PCS_a019 charging alert? This issue is reported on the Tesla Model 3, Model Y, Model S, Model X and Cybertruck. ## Related guides - [Tesla Phantom Drain: Stop Battery Loss While Parked — Independent: $0 - $150](https://evfixguide.com/guides/phantom-drain-parked) - [Tesla Not Charging at Home: Melted 14-50 Outlet Fix — Independent: $150 - $400](https://evfixguide.com/guides/home-charging-outlet-overheating) - [Tesla Battery Degradation: How to Check Range Loss — Independent: $100 - $250](https://evfixguide.com/guides/battery-degradation-range-loss) - [Tesla CP_a004: Charging Equipment Not Recognized Fix — Independent: $250 - $600](https://evfixguide.com/guides/cp-a004-charging-equipment-not-recognized) - [Tesla CP_a046: Charging Communication Lost - Fix — Independent: $150 - $600](https://evfixguide.com/guides/cp-a046-charging-communication-lost) - [Tesla UMC_a005: Mobile Connector Voltage Too Low Fix — Independent: $150 - $400](https://evfixguide.com/guides/umc-a005-mobile-connector-voltage-low) This guide is for information only. High-voltage components (orange cables) can be lethal — leave them to trained technicians. Not affiliated with Tesla, Inc.