### P0420 Catalytic Converter Issue
– Typical Sources:
Worn catalytic converter [1]
– Common Solutions:
Repair exhaust system https://carautorepair.site/
### P0171 Air-Fuel Ratio Error
– Likely Problems:
Vacuum leaks
– Troubleshooting Process:
Smoke test intake [1][7]
—
## Car Maintenance Terms
### Electronic Braking System
– Purpose: Prevents wheel lockup [7]
### ECM/ECU (Engine Control Module)
– Responsibility: Manages fuel injection [7]
### Drivetrain Components
– Contains: Differential [7]
—
## Mechanical Fixing Workflow
1. **Initial Diagnosis**:
Conduct road test
2. **Part Evaluation**:
Check voltage
3. **Component Installation**:
Clear error codes
4. **Final Quality Check**:
Test drive vehicle
—
## Necessary Equipment
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| OBD-II Tool | Innova | Live data streaming |
| Physical Equipment | Smoke machine | Electrical testing |
—
## Service Information References
### Mechanical Information System
– Features:
Wiring diagrams [8]
Factory repair procedures
### Smartphone Tools
– Vehicle Service App:
Electrical diagrams [5]
—
## Cost-Saving Tips
– Regular maintenance avoids costly repairs
– Understand DTC meanings to avoid unnecessary repairs
– Use aftermarket parts when budget constrained [7]