### P0420 Catalyst System Efficiency Below Threshold
– Frequent Reasons:
Worn catalytic converter [1]
– Suggested Repairs:
Replace catalytic converter https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Likely Problems:
Fuel delivery problems
– Testing Procedure:
Inspect injectors [1][7]
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## Car Maintenance Terms
### Skid Prevention Technology
– Function: Maintains steering control [7]
### Engine Management Unit
– Role: Monitors sensors [7]
### Powertrain Elements
– Includes: Drive axles [7]
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## Repair Process Steps
1. **Initial Diagnosis**:
Perform visual inspection
2. **System Verification**:
Check voltage
3. **Parts Replacement**:
Follow torque specs
4. **Post-Repair Verification**:
Ensure proper operation
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## Critical Instruments
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Diagnostic Scanner | Autel | Retrieve DTCs |
| Mechanical Tools | Multimeter | Component repair |
—
## Service Information References
### Auto Repair Source
– Features:
Component locations [8]
OEM specifications
### Digital Assistants
– Auto Repair Documents:
ECU pinouts [5]
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## Affordable Maintenance Advice
– Regular maintenance extends vehicle life
– Learn basic diagnostics to avoid unnecessary repairs
– Select certified components when OEM prices prohibitive [7]