### P0420 Catalytic Converter Issue
– Typical Sources:
Worn catalytic converter [1]
– Suggested Repairs:
Replace catalytic converter https://carautorepair.site/
### P0171 Air-Fuel Ratio Error
– Potential Issues:
Fuel delivery problems
– Troubleshooting Process:
Smoke test intake [1][7]
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## Auto Repair Terminology
### Electronic Braking System
– Function: Enables safe braking [7]
### Vehicle Computer System
– Responsibility: Controls ignition timing [7]
### Transmission System Parts
– Contains: Transmission [7]
—
## Service Procedure Stages
1. **Symptom Assessment**:
Scan DTCs
2. **System Verification**:
Measure resistance
3. **Component Installation**:
Clear error codes
4. **Post-Repair Verification**:
Ensure proper operation
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## Essential Tools
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Code Reader | BlueDriver | Live data streaming |
| Mechanical Tools | Torque wrench | Electrical testing |
—
## Repair Documentation Sources
### Mechanical Information System
– Capabilities:
TSB access [8]
Technical illustrations
### Digital Assistants
– Vehicle Service App:
Component testing guides [5]
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## Affordable Maintenance Advice
– Routine checkups avoids costly repairs
– Learn basic diagnostics to avoid unnecessary repairs
– Install quality alternatives when budget constrained [7]
