### P0420 Catalytic Converter Issue
– Common Causes:
Exhaust leaks [1]
– Suggested Repairs:
Replace catalytic converter https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Likely Problems:
Fuel delivery problems
– Testing Procedure:
Smoke test intake [1][7]
—
## Auto Repair Terminology
### Skid Prevention Technology
– Function: Maintains steering control [7]
### Engine Management Unit
– Responsibility: Controls ignition timing [7]
### Drivetrain Components
– Includes: Drive axles [7]
—
## Mechanical Fixing Workflow
1. **Initial Diagnosis**:
Scan DTCs
2. **Part Evaluation**:
Test continuity
3. **Defective Unit Swap**:
Use OEM parts
4. **System Validation**:
Test drive vehicle
—
## Essential Tools
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| OBD-II Tool | Autel | Retrieve DTCs |
| Physical Equipment | Smoke machine | Component repair |
—
## Repair Documentation Sources
### Vehicle Service Database
– Features:
Component locations [8]
OEM specifications
### Digital Assistants
– Vehicle Service App:
Electrical diagrams [5]
—
## Budget Repair Strategies
– Preventative service extends vehicle life
– Master code scanning to prevent mechanic overselling
– Install quality alternatives when OEM prices prohibitive [7]
