### P0420 Emissions Control Malfunction
– Common Causes:
Worn catalytic converter [1]
– Suggested Repairs:
Repair exhaust system https://carautorepair.site/
### P0171 System Too Lean
– Likely Problems:
Fuel delivery problems
– Testing Procedure:
Check fuel pressure [1][7]
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## Car Maintenance Terms
### Electronic Braking System
– Function: Enables safe braking [7]
### Engine Management Unit
– Responsibility: Monitors sensors [7]
### Drivetrain Components
– Includes: Differential [7]
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## Mechanical Fixing Workflow
1. **Problem Identification**:
Scan DTCs
2. **System Verification**:
Test continuity
3. **Parts Replacement**:
Use OEM parts
4. **Post-Repair Verification**:
Confirm warning light reset
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## Essential Tools
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Code Reader | Innova | Live data streaming |
| Physical Equipment | Torque wrench | Component repair |
—
## Technical Data Resources
### Vehicle Service Database
– Features:
Wiring diagrams [8]
Technical illustrations
### Mobile Applications
– Vehicle Service App:
Component testing guides [5]
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## Budget Repair Strategies
– Routine checkups extends vehicle life
– Master code scanning to prevent mechanic overselling
– Use aftermarket parts when OEM prices prohibitive [7]