### P0420 Catalytic Converter Issue
– Typical Sources:
Exhaust leaks [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]
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## Auto Repair Terminology
### Skid Prevention Technology
– Function: Enables safe braking [7]
### Vehicle Computer System
– Role: Monitors sensors [7]
### Drivetrain Components
– Contains: Drive axles [7]
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## Repair Process Steps
1. **Initial Diagnosis**:
Conduct road test
2. **Part Evaluation**:
Test continuity
3. **Component Installation**:
Use OEM parts
4. **System Validation**:
Ensure proper operation
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## Essential Tools
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Diagnostic Scanner | Autel | Retrieve DTCs |
| Hand Instruments | Multimeter | Electrical testing |
—
## Service Information References
### Vehicle Service Database
– Capabilities:
TSB access [8]
OEM specifications
### Mobile Applications
– Vehicle Service App:
Component testing guides [5]
—
## Budget Repair Strategies
– Regular maintenance extends vehicle life
– Master code scanning to avoid unnecessary repairs
– Use aftermarket parts when OEM prices prohibitive [7]
