### P0420 Catalytic Converter Issue
– Typical Sources:
Exhaust leaks [1]
– Common Solutions:
Replace catalytic converter https://carautorepair.site/
### P0171 System Too Lean
– Possible Defects:
Faulty MAF sensor
– Diagnostic Steps:
Smoke test intake [1][7]
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## Auto Repair Terminology
### Electronic Braking System
– Function: Maintains steering control [7]
### Vehicle Computer System
– Role: Manages fuel injection [7]
### Transmission System Parts
– Includes: Drive axles [7]
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## Repair Process Steps
1. **Problem Identification**:
Perform visual inspection
2. **System Verification**:
Measure resistance
3. **Component Installation**:
Clear error codes
4. **Post-Repair Verification**:
Ensure proper operation
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## Critical Instruments
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Diagnostic Scanner | Autel | Retrieve DTCs |
| Mechanical Tools | Smoke machine | Electrical testing |
—
## Repair Documentation Sources
### Mechanical Information System
– Features:
TSB access [8]
Factory repair procedures
### Smartphone Tools
– Vehicle Service App:
Electrical diagrams [5]
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## Cost-Saving Tips
– Regular maintenance prevents major failures
– Understand DTC meanings to prevent mechanic overselling
– Use aftermarket parts when budget constrained [7]