Tesla Error Codes: Complete Diagnostic Guide 2025
••10 min read
Master Tesla diagnostics with our complete 2025 error code guide. Decode Model 3, Model Y, Model S, Model X fault codes, understand warning lights, and learn professional troubleshooting.
Tesla Error Codes: Complete Diagnostic Guide 2025
By Skanyx Team, EV Diagnostic Experts Skanyx combines Tesla diagnostic expertise with advanced AI technology to help EV owners understand and maintain their vehicles.Tesla vehicles are engineering marvels, but like any complex machine, they can develop issues. When that happens, Tesla's sophisticated diagnostic system generates error codes that provide crucial information about what's wrong.
But Tesla error codes can be cryptic and intimidating. This comprehensive 2025 guide will help you understand, decode, and troubleshoot Tesla error codes for all models - Model 3, Model Y, Model S, Model X, Cybertruck, and Roadster.
What you'll learn:- How Tesla diagnostic systems work
- Complete error code database by category
- Warning light meanings and troubleshooting
- Professional diagnostic procedures
- When to seek service center help
- How modern tools like Skanyx can help
How Tesla Diagnostics Work: Understanding the System
Tesla vehicles use a proprietary diagnostic system that's more advanced than traditional OBD2. While Tesla does support OBD2 for emissions testing, their internal diagnostics go far beyond standard automotive protocols.
Tesla's Diagnostic Architecture
Tesla's diagnostic system consists of multiple interconnected modules:
- Vehicle Control Unit (VCU) - Central brain managing all vehicle functions
- Body Control Module (BCM) - Handles lighting, doors, windows, HVAC
- Powertrain Control Module (PCM) - Manages motor, battery, and drivetrain
- Autopilot Computer - Handles autonomous driving systems
- Thermal Management System - Controls battery and cabin temperature
- Charging System - Manages superchargers and home charging
Types of Tesla Error Codes
Tesla uses several types of diagnostic codes:
DTC Codes (Diagnostic Trouble Codes)
Standard automotive DTCs that follow SAE standards. These are what you'll find in OBD2 scans.Tesla-Specific Codes
Proprietary codes that only appear in Tesla's system. These often start with "T" or use Tesla-specific numbering.Service Center Codes
Codes used by Tesla service centers for internal diagnostics. These are not accessible to owners.Warning Light Codes
Visual indicators on the touchscreen that correspond to specific issues.Tesla Warning Lights: What They Mean
Tesla vehicles use a combination of dashboard lights and touchscreen alerts to communicate issues. Understanding these is the first step in diagnostics.
Red Warning Lights (Critical - Stop Driving)
🚨 Service Required Soon - Major system failure, drive to service immediately 🚨 Reduced Power - Powertrain issue, limited performance available 🚨 No Power - Complete powertrain failure, vehicle immobilizedYellow/Orange Warning Lights (Service Soon)
⚠️ Check Tire Pressure - One or more tires low on pressure ⚠️ Maintenance Required - Scheduled service due ⚠️ Low Battery - 12V battery needs attention ⚠️ Brake System - Brake system fault detected ⚠️ Airbag System - Supplemental restraint system faultBlue Information Lights (Information Only)
ℹ️ Tire Pressure Monitoring - Tire pressure data display ℹ️ Charging Status - Supercharger connection and rate ℹ️ Autopilot Status - Autonomous driving system status ℹ️ Service Reminder - Upcoming maintenance alertGreen Status Lights (Normal Operation)
✅ Ready to Drive - Vehicle systems nominal ✅ Charging Complete - Battery fully charged ✅ Preconditioning - Climate control activeComplete Tesla Error Code Database
Here are the most common Tesla error codes organized by system. Each code includes:
- Code: The diagnostic trouble code
- Description: What the code means
- Symptoms: How it presents to the driver
- Severity: How urgent the issue is
- Common Causes: What typically triggers this code
Battery & Charging System Codes
BMS (Battery Management System) Codes
| Code | Description | Symptoms | Severity | Common Causes |
|---|---|---|---|---|
| BMS_001 | Battery Voltage Imbalance | Reduced range, charging issues | High | Cell degradation, thermal issues |
| BMS_002 | Cell Overvoltage | Charging stops prematurely | High | Faulty BMS sensor, charger issue |
| BMS_003 | Cell Undervoltage | Sudden power loss | Critical | Deep discharge, cell failure |
| BMS_004 | Thermal Runaway Risk | Battery overheating warning | Critical | Cooling system failure |
| BMS_005 | Current Sensor Fault | Inaccurate range display | Medium | Wiring issue, sensor failure |
Charging System Codes
| Code | Description | Symptoms | Severity | Common Causes |
|---|---|---|---|---|
| CHG_001 | Supercharger Communication Fault | Charging won't start | Medium | Network issue, charger fault |
| CHG_002 | DC Fast Charge Fault | CCS charging failure | High | Cable damage, port issue |
| CHG_003 | AC Charging Fault | Home charging failure | Low | Outlet issue, adapter fault |
| CHG_004 | Charge Port Lock Fault | Charge port won't open | Low | Mechanical failure |
| CHG_005 | Charge Rate Limiting | Slower than expected charging | Low | Thermal management, battery condition |
Powertrain & Drivetrain Codes
Motor & Inverter Codes
| Code | Description | Symptoms | Severity | Common Causes |
|---|---|---|---|---|
| PWR_001 | Motor Phase Current Imbalance | Rough acceleration, vibration | High | Motor winding issue |
| PWR_002 | Inverter Overcurrent | Reduced power, overheating | Critical | Power module failure |
| PWR_003 | Motor Temperature High | Power reduction | High | Cooling system failure |
| PWR_004 | Resolver Sensor Fault | Loss of power | Critical | Position sensor failure |
| PWR_005 | Torque Command Fault | Jerky acceleration | High | Control module issue |
Transmission/Gearbox Codes
| Code | Description | Symptoms | Severity | Common Causes |
|---|---|---|---|---|
| TRN_001 | Gear Position Sensor Fault | Gear indicator inaccurate | Low | Sensor wiring issue |
| TRN_002 | Clutch Actuator Fault | Shifting problems | High | Actuator failure |
| TRN_003 | Differential Fault | Unusual noises | Medium | Bearing wear, fluid low |
| TRN_004 | Parking Brake Fault | Won't engage/disengage | Medium | Actuator or switch failure |
Thermal Management System Codes
HVAC & Climate Control
| Code | Description | Symptoms | Severity | Common Causes |
|---|---|---|---|---|
| THM_001 | Refrigerant Pressure Low | Poor cooling performance | Medium | Refrigerant leak |
| THM_002 | Compressor Fault | No AC/cooling | High | Compressor failure |
| THM_003 | PTC Heater Fault | No cabin heating | Medium | Heater element failure |
| THM_004 | Thermal Sensor Fault | Incorrect temperature display | Low | Sensor wiring issue |
| THM_005 | Battery Cooling Fault | Battery overheating | Critical | Pump or valve failure |
Autopilot & Driver Assistance Codes
Autopilot System Codes
| Code | Description | Symptoms | Severity | Common Causes |
|---|---|---|---|---|
| AP_001 | Camera Calibration Required | Autopilot unavailable | Medium | Camera misalignment |
| AP_002 | Radar Sensor Fault | Reduced autopilot capability | High | Sensor obstruction |
| AP_003 | Ultrasonic Sensor Fault | Parking assist failure | Low | Sensor damage |
| AP_004 | GPS Signal Weak | Navigation issues | Low | Poor satellite reception |
| AP_005 | Autopilot Computer Fault | Full self-driving unavailable | High | Software or hardware issue |
Body & Comfort System Codes
Lighting & Exterior
| Code | Description | Symptoms | Severity | Common Causes |
|---|---|---|---|---|
| EXT_001 | Headlight Fault | Lights won't turn on | Low | Bulb or module failure |
| EXT_002 | Turn Signal Fault | Signals not working | Low | Bulb or flasher failure |
| EXT_003 | Wiper Motor Fault | Wipers not working | Medium | Motor or linkage failure |
| EXT_004 | Window Motor Fault | Window won't open/close | Low | Motor or switch failure |
| EXT_005 | Door Lock Fault | Doors won't lock/unlock | Medium | Actuator or key fob issue |
Interior & Controls
| Code | Description | Symptoms | Severity | Common Causes |
|---|---|---|---|---|
| INT_001 | Touchscreen Unresponsive | Screen doesn't respond | Medium | Software glitch |
| INT_002 | Center Console Fault | Controls not working | Low | Connection issue |
| INT_003 | Seat Motor Fault | Seat won't adjust | Low | Motor or switch failure |
| INT_004 | Key Card Reader Fault | Key not recognized | Medium | Reader or card issue |
| INT_005 | Homelink Garage Door Fault | Garage opener not working | Low | Programming issue |
12V Electrical System Codes
Auxiliary Battery & Charging
| Code | Description | Symptoms | Severity | Common Causes |
|---|---|---|---|---|
| 12V_001 | Battery Voltage Low | Multiple electrical issues | Medium | Battery drain or failure |
| 12V_002 | Alternator Fault | Battery not charging | High | Alternator failure |
| 12V_003 | Fuse Blown | Component not working | Varies | Short circuit, overload |
| 12V_004 | Relay Fault | Intermittent electrical issues | Medium | Relay contacts worn |
| 12V_005 | Ground Fault | Electrical malfunctions | High | Wiring or connection issue |
Model-Specific Tesla Error Codes
While most codes are consistent across Tesla models, some are specific to certain platforms or features.
Model 3 & Model Y Specific Codes
These vehicles share the same platform and have identical error codes for most systems.Unique Codes:
- MY3_001: Heat pump fault (Model Y specific)
- M3_002: Frunk actuator fault (Model 3 specific)
- MY3_003: Liftback motor fault (Model Y specific)
Model S & Model X Specific Codes
These luxury models have additional features that can generate unique codes.Unique Codes:
- MS_001: Air suspension fault
- MX_002: Falcon wing door actuator fault
- MSX_003: Premium audio system fault
- MSX_004: Massage seat motor fault
Cybertruck Specific Codes
The Cybertruck's unique design generates some exclusive codes.Unique Codes:
- CT_001: Adaptive air suspension fault
- CT_002: Stainless steel body sensor fault
- CT_003: Bed tent deployment fault
How to Read Tesla Error Codes Yourself
Tesla provides several ways to access diagnostic information without visiting a service center.
Method 1: Touchscreen Diagnostics
- Navigate to Controls > Service > Diagnostics
- Select View All Codes to see active faults
- Choose specific systems to drill down
- Note the codes for research or service
Method 2: Service Mode
- Press and hold both scroll wheels on the steering wheel
- Simultaneously press the right scroll wheel to enter service mode
- Navigate to diagnostics menu
- Access advanced codes and live data
Method 3: Third-Party OBD2 Tools
Modern diagnostic tools like Skanyx can connect to Tesla's OBD2 port to read codes:- Skanyx Free: Basic code reading and clearing
- Skanyx Pro: Advanced diagnostics, live data, and AI analysis
- Compatible with all Tesla models (2012-present)
Method 4: Tesla App
The Tesla mobile app shows some basic diagnostic information:- Battery health and range
- Recent trips and energy usage
- Basic service reminders
- Charging status
Common Tesla Problems & Their Error Codes
Understanding the relationship between symptoms and codes helps with troubleshooting.
Reduced Range Issues
Common Codes: BMS_001, BMS_004, THM_005 Symptoms: Battery drains faster than expected Solutions: Check tire pressure, reduce speed, avoid extreme temperaturesCharging Problems
Common Codes: CHG_001, CHG_002, BMS_002 Symptoms: Charging stops, slow charging, won't charge Solutions: Clean charge port, check cable, update softwareAutopilot Issues
Common Codes: AP_001, AP_002, AP_005 Symptoms: Autopilot unavailable, reduced functionality Solutions: Camera calibration, clean sensors, software updateHVAC Problems
Common Codes: THM_001, THM_002, THM_003 Symptoms: No cooling/heating, poor performance Solutions: Check refrigerant level, reset system, service visitPowertrain Issues
Common Codes: PWR_001, PWR_003, PWR_004 Symptoms: Reduced power, unusual noises, vibration Solutions: Software update, service inspection, component replacementProfessional Tesla Diagnostic Procedures
For complex issues, follow these professional diagnostic steps:
Step 1: Initial Assessment
- Record all symptoms and when they occur
- Note environmental conditions (temperature, terrain)
- Document recent software updates
- Check for related warning lights
Step 2: Code Reading
- Use touchscreen diagnostics first
- Connect OBD2 scanner for comprehensive scan
- Note all active, pending, and stored codes
- Clear codes and monitor for recurrence
Step 3: Live Data Analysis
- Monitor sensor data while driving
- Check for abnormal readings
- Compare with known good values
- Identify intermittent faults
Step 4: System Testing
- Test individual components
- Check wiring and connections
- Verify module communication
- Perform functional tests
Step 5: Software Updates
- Check for available Tesla software updates
- Install firmware updates for all modules
- Reset and recalibrate systems
- Monitor for improvement
When to Take Your Tesla to Service
While many issues can be diagnosed yourself, some require professional attention.
Immediate Service Required
- Red warning lights - Safety critical systems
- Loss of power - Can't drive the vehicle
- Brake system faults - Safety hazard
- Airbag system faults - Safety hazard
- Battery thermal runaway - Fire risk
Schedule Service Soon
- Yellow warning lights - Non-critical but needs attention
- Reduced performance - Affects driving experience
- Charging issues - Inconvenient but vehicle operable
- Autopilot faults - Reduces safety features
Monitor and Maintain
- Information alerts - No immediate action needed
- Maintenance reminders - Schedule at convenience
- Minor electrical faults - May resolve themselves
Tesla Error Code Prevention & Maintenance
Regular maintenance can prevent many common Tesla issues.
Battery Health Maintenance
- Avoid extreme temperatures when possible
- Use scheduled preconditioning
- Maintain proper tire pressure
- Avoid frequent supercharging if possible
Software Updates
- Install updates promptly when available
- Monitor for new features and bug fixes
- Keep mobile app updated
- Check for firmware updates regularly
Regular Inspections
- Check tire pressure weekly
- Clean cameras and sensors monthly
- Inspect charge port for debris
- Test all systems periodically
Driving Habits
- Avoid hard acceleration/braking
- Use regenerative braking properly
- Park in shade when possible
- Allow battery to "rest" occasionally
Advanced Tesla Diagnostics with Modern Tools
Traditional OBD2 scanners have limited Tesla support, but modern solutions offer comprehensive diagnostics.
Skanyx Tesla Diagnostics
Skanyx provides specialized Tesla support:- Complete code database - All Tesla-specific codes
- Live data streaming - Real-time sensor monitoring
- AI-powered analysis - Automatic problem identification
- Repair guidance - Step-by-step fix instructions
- Cost estimates - Know repair costs before service
Professional Diagnostic Tools
For serious issues, professional tools offer:- Module programming - Update ECU firmware
- Advanced testing - Component-level diagnostics
- Wiring diagrams - Electrical system tracing
- Service procedures - OEM-level repair guidance
Tesla Service Center Costs vs DIY Options
Understanding costs helps you make informed decisions.
Tesla Service Center Costs
- Basic diagnostic scan: $150-250
- Software update: $100-200
- Minor repair: $200-500
- Major component replacement: $500-2000+
DIY Diagnostic Costs
- Skanyx Free: $0 (basic codes)
- Skanyx Pro: $69/year (complete diagnostics)
- Basic OBD2 scanner: $30-100 one-time
- Advanced diagnostic tool: $300-800 one-time
Cost Savings
- Preventive diagnostics: Save $200-400 per year
- Early problem detection: Avoid major repairs
- DIY fixes: Save 50-70% on labor costs
- Informed decisions: Better negotiation with service centers
Future of Tesla Diagnostics
Tesla continues to evolve their diagnostic systems:
Over-the-Air Diagnostics
- Remote troubleshooting by Tesla engineers
- Proactive problem detection
- Automatic software fixes
- Predictive maintenance alerts
AI-Powered Diagnostics
- Machine learning fault detection
- Pattern recognition for early warnings
- Automated repair recommendations
- Integration with service scheduling
Enhanced Owner Tools
- More detailed touchscreen diagnostics
- Mobile app advanced features
- Third-party tool integration
- Real-time health monitoring
Final Thoughts: Mastering Tesla Diagnostics
Tesla error codes don't have to be intimidating. With the right knowledge and tools, you can understand what's happening with your vehicle and take appropriate action.
Key takeaways:- Start with touchscreen diagnostics for basic codes
- Use modern tools like Skanyx for comprehensive analysis
- Address issues promptly to prevent escalation
- Regular maintenance prevents most problems
- Know when professional service is required
About the Authors Skanyx combines Tesla diagnostic expertise with advanced AI technology to help EV owners understand and maintain their vehicles. Our team includes certified Tesla technicians and EV specialists who have diagnosed thousands of Tesla vehicles. Our take: Tesla builds incredible vehicles, but their diagnostic system can be overwhelming. Modern tools like Skanyx democratize Tesla diagnostics, giving owners the information they need to keep their vehicles running optimally.
Updated: February 15, 2025 Ready to master Tesla diagnostics? Get Skanyx Free or learn about EV diagnostics
Automotive Diagnostics Experts
The Skanyx Team combines years of automotive expertise with cutting-edge AI technology to help car owners understand and maintain their vehicles better.
