### P0420 Catalytic Converter Issue
– Frequent Reasons:
Worn catalytic converter [1]
– Common Solutions:
Replace catalytic converter https://carautorepair.site/
### P0171 System Too Lean
– Possible Defects:
Faulty MAF sensor
– Diagnostic Steps:
Inspect injectors [1][7]
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## Car Maintenance Terms
### Electronic Braking System
– Function: Maintains steering control [7]
### Engine Management Unit
– Role: Manages fuel injection [7]
### Drivetrain Components
– Includes: Differential [7]
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## Service Procedure Stages
1. **Initial Diagnosis**:
Conduct road test
2. **Component Testing**:
Check voltage
3. **Parts Replacement**:
Use OEM parts
4. **System Validation**:
Confirm warning light reset
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## Essential Tools
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| OBD-II Tool | Innova | Live data streaming |
| Hand Instruments | Multimeter | Component repair |
—
## Technical Data Resources
### Vehicle Service Database
– Features:
TSB access [8]
Technical illustrations
### Mobile Applications
– Auto Repair Documents:
ECU pinouts [5]
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## Budget Repair Strategies
– Routine checkups avoids costly repairs
– Understand DTC meanings to avoid unnecessary repairs
– Select certified components when OEM prices prohibitive [7]