### P0420 Catalytic Converter Issue
– Frequent Reasons:
Exhaust leaks [1]
– Recommended Fixes:
Replace catalytic converter https://carautorepair.site/
### P0171 Air-Fuel Ratio Error
– Possible Defects:
Faulty MAF sensor
– Diagnostic Steps:
Smoke test intake [1][7]
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## Car Maintenance Terms
### Electronic Braking System
– Purpose: Prevents wheel lockup [7]
### Engine Management Unit
– Role: Manages fuel injection [7]
### Powertrain Elements
– Includes: Transmission [7]
—
## Service Procedure Stages
1. **Initial Diagnosis**:
Conduct road test
2. **Part Evaluation**:
Measure resistance
3. **Component Installation**:
Follow torque specs
4. **Post-Repair Verification**:
Ensure proper operation
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## Critical Instruments
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Diagnostic Scanner | BlueDriver | Retrieve DTCs |
| Physical Equipment | Smoke machine | Electrical testing |
—
## Technical Data Resources
### Auto Repair Source
– Features:
TSB access [8]
OEM specifications
### Digital Assistants
– Vehicle Service App:
Electrical diagrams [5]
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## Cost-Saving Tips
– Preventative service prevents major failures
– Master code scanning to prevent mechanic overselling
– Install quality alternatives when OEM prices prohibitive [7]
