### P0420 Catalyst System Efficiency Below Threshold
– Typical Sources:
Faulty oxygen sensor [1]
– Common Solutions:
Replace catalytic converter https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Potential Issues:
Vacuum leaks
– Troubleshooting Process:
Check fuel pressure [1][7]
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## Vehicle Service Vocabulary
### ABS (Anti-Lock Brake System)
– Purpose: Enables safe braking [7]
### Vehicle Computer System
– Responsibility: Manages fuel injection [7]
### Powertrain Elements
– Includes: Differential [7]
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## Service Procedure Stages
1. **Problem Identification**:
Scan DTCs
2. **Part Evaluation**:
Measure resistance
3. **Defective Unit Swap**:
Use OEM parts
4. **Final Quality Check**:
Ensure proper operation
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## Critical Instruments
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Code Reader | BlueDriver | Live data streaming |
| Physical Equipment | Multimeter | Component repair |
—
## Service Information References
### Auto Repair Source
– Capabilities:
Component locations [8]
Technical illustrations
### Mobile Applications
– Auto Repair Documents:
ECU pinouts [5]
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## Affordable Maintenance Advice
– Regular maintenance extends vehicle life
– Master code scanning to prevent mechanic overselling
– Select certified components when budget constrained [7]
