### P0420 Emissions Control Malfunction
– Common Causes:
Faulty oxygen sensor [1]
– Common Solutions:
Replace catalytic converter https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Potential Issues:
Faulty MAF sensor
– Diagnostic Steps:
Check fuel pressure [1][7]
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## Auto Repair Terminology
### ABS (Anti-Lock Brake System)
– Function: Maintains steering control [7]
### Vehicle Computer System
– Role: Monitors sensors [7]
### Transmission System Parts
– Includes: Transmission [7]
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## Repair Process Steps
1. **Symptom Assessment**:
Perform visual inspection
2. **System Verification**:
Measure resistance
3. **Defective Unit Swap**:
Use OEM parts
4. **Post-Repair Verification**:
Test drive vehicle
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## Critical Instruments
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Diagnostic Scanner | Autel | Live data streaming |
| Hand Instruments | Smoke machine | Component repair |
—
## Service Information References
### Mechanical Information System
– Features:
Wiring diagrams [8]
OEM specifications
### Mobile Applications
– Auto Repair Documents:
Component testing guides [5]
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## Budget Repair Strategies
– Routine checkups extends vehicle life
– Understand DTC meanings to avoid unnecessary repairs
– Select certified components when OEM prices prohibitive [7]