### P0420 Catalyst System Efficiency Below Threshold
– Common Causes:
Worn catalytic converter [1]
– Common Solutions:
Repair exhaust system https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Likely Problems:
Fuel delivery problems
– Troubleshooting Process:
Check fuel pressure [1][7]
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## Car Maintenance Terms
### Skid Prevention Technology
– Purpose: Enables safe braking [7]
### Vehicle Computer System
– Role: Controls ignition timing [7]
### Transmission System Parts
– Includes: Differential [7]
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## Repair Process Steps
1. **Initial Diagnosis**:
Scan DTCs
2. **Part Evaluation**:
Measure resistance
3. **Parts Replacement**:
Follow torque specs
4. **Post-Repair Verification**:
Confirm warning light reset
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## Critical Instruments
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Diagnostic Scanner | BlueDriver | Live data streaming |
| Physical Equipment | Torque wrench | Electrical testing |
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## Repair Documentation Sources
### Auto Repair Source
– Features:
Wiring diagrams [8]
OEM specifications
### Mobile Applications
– Auto Repair Documents:
Electrical diagrams [5]
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## Budget Repair Strategies
– Routine checkups extends vehicle life
– Understand DTC meanings to prevent mechanic overselling
– Use aftermarket parts when budget constrained [7]