Tesla CP_a043 — Charge Rate Reduced

Charge Port System (CP) alert — plain English explanation and what to do next

System

Charge Port System (CP)

Severity

Low Severity

Dealer visit

Not required

Affects models

Model 3, Y, S

What CP_a043 means

CP_a043 means Tesla intentionally reduced charging speed. This is not an error — it is the vehicle protecting itself. Common when battery is hot cold or nearly full.

What to do

✓ Completely normal protective behavior. Your Tesla is protecting its battery. Usually no action needed.

Check battery temperature — Hot or cold weather naturally slows charging to protect the battery.

Precondition before charging — Navigate to Supercharger as destination so Tesla preconditions the battery.

Check charge percentage — Above 80% charge speed naturally tapers. Keep below 80% for faster charging.

Wait it out — Charge speed increases as battery reaches optimal temperature.

Related Tesla error codes

Get a real diagnosis for your Tesla

Connect your Tesla to VoltDoc.ai for a free real-time health report — battery status, active fault codes, and AI-powered guidance.

⚡ Run Free Diagnostic