### P0420 Emissions Control Malfunction
– Typical Sources:
Exhaust leaks [1]
– Suggested Repairs:
Repair exhaust system https://carautorepair.site/
### P0171 System Too Lean
– Possible Defects:
Faulty MAF sensor
– Testing Procedure:
Check fuel pressure [1][7]
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## Car Maintenance Terms
### Electronic Braking System
– Purpose: Maintains steering control [7]
### Vehicle Computer System
– Responsibility: Controls ignition timing [7]
### Drivetrain Components
– Includes: Differential [7]
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## Repair Process Steps
1. **Initial Diagnosis**:
Conduct road test
2. **Part Evaluation**:
Check voltage
3. **Parts Replacement**:
Follow torque specs
4. **System Validation**:
Ensure proper operation
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## Essential Tools
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| OBD-II Tool | Innova | Live data streaming |
| Mechanical Tools | Smoke machine | Electrical testing |
—
## Service Information References
### Mechanical Information System
– Capabilities:
Component locations [8]
OEM specifications
### Digital Assistants
– Vehicle Service App:
Electrical diagrams [5]
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## Affordable Maintenance Advice
– Preventative service avoids costly repairs
– Learn basic diagnostics to prevent mechanic overselling
– Use aftermarket parts when OEM prices prohibitive [7]