### P0420 Catalytic Converter Issue
– Frequent Reasons:
Worn catalytic converter [1]
– Recommended Fixes:
Repair exhaust system https://carautorepair.site/
### P0171 System Too Lean
– Possible Defects:
Faulty MAF sensor
– Troubleshooting Process:
Inspect injectors [1][7]
—
## Vehicle Service Vocabulary
### Electronic Braking System
– Purpose: Enables safe braking [7]
### Engine Management Unit
– Role: Manages fuel injection [7]
### Powertrain Elements
– Includes: Transmission [7]
—
## Repair Process Steps
1. **Problem Identification**:
Conduct road test
2. **Part Evaluation**:
Check voltage
3. **Component Installation**:
Clear error codes
4. **Post-Repair Verification**:
Ensure proper operation
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## Necessary Equipment
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Code Reader | BlueDriver | Retrieve DTCs |
| Hand Instruments | Torque wrench | Electrical testing |
—
## Technical Data Resources
### Auto Repair Source
– Features:
TSB access [8]
OEM specifications
### Smartphone Tools
– Auto Repair Documents:
ECU pinouts [5]
—
## Cost-Saving Tips
– Routine checkups avoids costly repairs
– Learn basic diagnostics to prevent mechanic overselling
– Select certified components when budget constrained [7]