### P0420 Catalytic Converter Issue
– Frequent Reasons:
Worn catalytic converter [1]
– Recommended Fixes:
Replace catalytic converter https://carautorepair.site/
### P0171 System Too Lean
– Possible Defects:
Fuel delivery problems
– Troubleshooting Process:
Check fuel pressure [1][7]
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## Car Maintenance Terms
### Electronic Braking System
– Function: Enables safe braking [7]
### Vehicle Computer System
– Responsibility: Manages fuel injection [7]
### Drivetrain Components
– Contains: Drive axles [7]
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## Service Procedure Stages
1. **Symptom Assessment**:
Perform visual inspection
2. **Component Testing**:
Check voltage
3. **Parts Replacement**:
Clear error codes
4. **Final Quality Check**:
Confirm warning light reset
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## Essential Tools
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Diagnostic Scanner | Innova | Live data streaming |
| Physical Equipment | Torque wrench | Component repair |
—
## Repair Documentation Sources
### Mechanical Information System
– Features:
TSB access [8]
OEM specifications
### Smartphone Tools
– Vehicle Service App:
Electrical diagrams [5]
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## Affordable Maintenance Advice
– Regular maintenance extends vehicle life
– Master code scanning to avoid unnecessary repairs
– Install quality alternatives when OEM prices prohibitive [7]