### P0420 Emissions Control Malfunction
– Typical Sources:
Worn catalytic converter [1]
– Recommended Fixes:
Diagnose fuel trim https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Likely Problems:
Vacuum leaks
– Diagnostic Steps:
Smoke test intake [1][7]
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## Car Maintenance Terms
### Skid Prevention Technology
– Function: Prevents wheel lockup [7]
### Vehicle Computer System
– Role: Manages fuel injection [7]
### Drivetrain Components
– Includes: Differential [7]
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## Service Procedure Stages
1. **Symptom Assessment**:
Conduct road test
2. **System Verification**:
Test continuity
3. **Parts Replacement**:
Clear error codes
4. **System Validation**:
Ensure proper operation
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## Essential Tools
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Code Reader | BlueDriver | Retrieve DTCs |
| Mechanical Tools | Torque wrench | Component repair |
—
## Service Information References
### Auto Repair Source
– Features:
Component locations [8]
OEM specifications
### Mobile Applications
– Vehicle Service App:
Component testing guides [5]
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## Budget Repair Strategies
– Preventative service extends vehicle life
– Understand DTC meanings to prevent mechanic overselling
– Use aftermarket parts when OEM prices prohibitive [7]
