### P0420 Catalytic Converter Issue
– Typical Sources:
Faulty oxygen sensor [1]
– Common Solutions:
Replace catalytic converter https://carautorepair.site/
### P0171 System Too Lean
– Possible Defects:
Vacuum leaks
– Troubleshooting Process:
Check fuel pressure [1][7]
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## Vehicle Service Vocabulary
### ABS (Anti-Lock Brake System)
– Function: Maintains steering control [7]
### ECM/ECU (Engine Control Module)
– Role: Monitors sensors [7]
### Transmission System Parts
– Includes: Drive axles [7]
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## Service Procedure Stages
1. **Problem Identification**:
Conduct road test
2. **System Verification**:
Measure resistance
3. **Defective Unit Swap**:
Clear error codes
4. **Post-Repair Verification**:
Test drive vehicle
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## Necessary Equipment
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Code Reader | BlueDriver | Live data streaming |
| Physical Equipment | Torque wrench | Component repair |
—
## Technical Data Resources
### Vehicle Service Database
– Capabilities:
TSB access [8]
Technical illustrations
### Smartphone Tools
– Auto Repair Documents:
ECU pinouts [5]
—
## Budget Repair Strategies
– Preventative service prevents major failures
– Master code scanning to prevent mechanic overselling
– Select certified components when budget constrained [7]