### P0420 Catalytic Converter Issue
– Common Causes:
Exhaust leaks [1]
– Common Solutions:
Replace catalytic converter https://carautorepair.site/
### P0171 Air-Fuel Ratio Error
– Possible Defects:
Fuel delivery problems
– Troubleshooting Process:
Check fuel pressure [1][7]
—
## Car Maintenance Terms
### Skid Prevention Technology
– Function: Maintains steering control [7]
### Vehicle Computer System
– Responsibility: Manages fuel injection [7]
### Transmission System Parts
– Includes: Differential [7]
—
## Mechanical Fixing Workflow
1. **Problem Identification**:
Perform visual inspection
2. **System Verification**:
Check voltage
3. **Parts Replacement**:
Clear error codes
4. **System Validation**:
Ensure proper operation
—
## Necessary Equipment
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| OBD-II Tool | Innova | Retrieve DTCs |
| Physical Equipment | Torque wrench | Electrical testing |
—
## Service Information References
### Mechanical Information System
– Features:
TSB access [8]
Technical illustrations
### Smartphone Tools
– Auto Repair Documents:
Component testing guides [5]
—
## Budget Repair Strategies
– Regular maintenance avoids costly repairs
– Learn basic diagnostics to avoid unnecessary repairs
– Use aftermarket parts when OEM prices prohibitive [7]
