### P0420 Catalytic Converter Issue
– Frequent Reasons:
Exhaust leaks [1]
– Suggested Repairs:
Replace catalytic converter https://carautorepair.site/
### P0171 Air-Fuel Ratio Error
– Potential Issues:
Fuel delivery problems
– Diagnostic Steps:
Smoke test intake [1][7]
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## Car Maintenance Terms
### ABS (Anti-Lock Brake System)
– Purpose: Enables safe braking [7]
### Vehicle Computer System
– Role: Controls ignition timing [7]
### Drivetrain Components
– Includes: Drive axles [7]
—
## Repair Process Steps
1. **Initial Diagnosis**:
Scan DTCs
2. **Component Testing**:
Measure resistance
3. **Component Installation**:
Clear error codes
4. **Final Quality Check**:
Test drive vehicle
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## Critical Instruments
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Diagnostic Scanner | BlueDriver | Live data streaming |
| Physical Equipment | Torque wrench | Electrical testing |
—
## Technical Data Resources
### Vehicle Service Database
– Capabilities:
TSB access [8]
Factory repair procedures
### Smartphone Tools
– Vehicle Service App:
Electrical diagrams [5]
—
## Affordable Maintenance Advice
– Regular maintenance avoids costly repairs
– Master code scanning to prevent mechanic overselling
– Use aftermarket parts when OEM prices prohibitive [7]