### P0420 Emissions Control Malfunction
– Typical Sources:
Exhaust leaks [1]
– Recommended Fixes:
Replace catalytic converter https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Possible Defects:
Vacuum leaks
– Troubleshooting Process:
Smoke test intake [1][7]
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## Auto Repair Terminology
### ABS (Anti-Lock Brake System)
– Function: Maintains steering control [7]
### Engine Management Unit
– Role: Manages fuel injection [7]
### Powertrain Elements
– Contains: Differential [7]
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## Mechanical Fixing Workflow
1. **Symptom Assessment**:
Scan DTCs
2. **Component Testing**:
Measure resistance
3. **Defective Unit Swap**:
Clear error codes
4. **Final Quality Check**:
Test drive vehicle
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## Essential Tools
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Code Reader | Autel | Retrieve DTCs |
| Hand Instruments | Torque wrench | Component repair |
—
## Repair Documentation Sources
### Auto Repair Source
– Capabilities:
TSB access [8]
Factory repair procedures
### Mobile Applications
– Vehicle Service App:
Component testing guides [5]
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## Affordable Maintenance Advice
– Preventative service extends vehicle life
– Master code scanning to prevent mechanic overselling
– Use aftermarket parts when OEM prices prohibitive [7]
