### P0420 Catalytic Converter Issue
– Common Causes:
Exhaust leaks [1]
– Suggested Repairs:
Replace catalytic converter https://carautorepair.site/
### P0171 Air-Fuel Ratio Error
– Possible Defects:
Faulty MAF sensor
– Troubleshooting Process:
Check fuel pressure [1][7]
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## Vehicle Service Vocabulary
### Skid Prevention Technology
– Function: Maintains steering control [7]
### Engine Management Unit
– Role: Manages fuel injection [7]
### Powertrain Elements
– Contains: Drive axles [7]
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## Repair Process Steps
1. **Problem Identification**:
Conduct road test
2. **Part Evaluation**:
Test continuity
3. **Component Installation**:
Use OEM parts
4. **Final Quality Check**:
Ensure proper operation
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## Essential Tools
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| OBD-II Tool | BlueDriver | Retrieve DTCs |
| Physical Equipment | Smoke machine | Component repair |
—
## Service Information References
### Mechanical Information System
– Capabilities:
Wiring diagrams [8]
Technical illustrations
### Digital Assistants
– Vehicle Service App:
ECU pinouts [5]
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## Budget Repair Strategies
– Regular maintenance prevents major failures
– Master code scanning to prevent mechanic overselling
– Select certified components when budget constrained [7]
