### P0420 Emissions Control Malfunction
– Common Causes:
Faulty oxygen sensor [1]
– Suggested Repairs:
Replace catalytic converter https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Possible Defects:
Faulty MAF sensor
– Testing Procedure:
Inspect injectors [1][7]
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## Car Maintenance Terms
### Skid Prevention Technology
– Purpose: Maintains steering control [7]
### Vehicle Computer System
– Role: Monitors sensors [7]
### Powertrain Elements
– Contains: Drive axles [7]
—
## Repair Process Steps
1. **Initial Diagnosis**:
Conduct road test
2. **System Verification**:
Check voltage
3. **Component Installation**:
Follow torque specs
4. **Final Quality Check**:
Confirm warning light reset
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## Necessary Equipment
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| OBD-II Tool | Innova | Retrieve DTCs |
| Hand Instruments | Torque wrench | Component repair |
—
## Technical Data Resources
### Auto Repair Source
– Capabilities:
TSB access [8]
OEM specifications
### Smartphone Tools
– Auto Repair Documents:
Electrical diagrams [5]
—
## Budget Repair Strategies
– Routine checkups extends vehicle life
– Master code scanning to prevent mechanic overselling
– Install quality alternatives when budget constrained [7]
