### P0420 Emissions Control Malfunction
– Frequent Reasons:
Worn catalytic converter [1]
– Common Solutions:
Replace catalytic converter https://carautorepair.site/
### P0171 Air-Fuel Ratio Error
– Possible Defects:
Vacuum leaks
– Testing Procedure:
Check fuel pressure [1][7]
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## Auto Repair Terminology
### ABS (Anti-Lock Brake System)
– Function: Enables safe braking [7]
### Vehicle Computer System
– Role: Monitors sensors [7]
### Drivetrain Components
– Includes: Differential [7]
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## Repair Process Steps
1. **Symptom Assessment**:
Perform visual inspection
2. **Component Testing**:
Test continuity
3. **Defective Unit Swap**:
Follow torque specs
4. **Final Quality Check**:
Ensure proper operation
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## Critical Instruments
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Diagnostic Scanner | BlueDriver | Live data streaming |
| Mechanical Tools | Torque wrench | Component repair |
—
## Repair Documentation Sources
### Auto Repair Source
– Capabilities:
Component locations [8]
Factory repair procedures
### Digital Assistants
– Vehicle Service App:
Electrical diagrams [5]
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## Affordable Maintenance Advice
– Routine checkups extends vehicle life
– Understand DTC meanings to avoid unnecessary repairs
– Select certified components when OEM prices prohibitive [7]
