### P0420 Emissions Control Malfunction
– Typical Sources:
Worn catalytic converter [1]
– Common Solutions:
Repair exhaust system https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Potential Issues:
Vacuum leaks
– Testing Procedure:
Smoke test intake [1][7]
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## Vehicle Service Vocabulary
### ABS (Anti-Lock Brake System)
– Purpose: Prevents wheel lockup [7]
### Engine Management Unit
– Responsibility: Controls ignition timing [7]
### Powertrain Elements
– Includes: Drive axles [7]
—
## Service Procedure Stages
1. **Initial Diagnosis**:
Scan DTCs
2. **Part Evaluation**:
Test continuity
3. **Defective Unit Swap**:
Follow torque specs
4. **System Validation**:
Test drive vehicle
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## Critical Instruments
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Diagnostic Scanner | BlueDriver | Live data streaming |
| Physical Equipment | Smoke machine | Component repair |
—
## Technical Data Resources
### Auto Repair Source
– Features:
Wiring diagrams [8]
OEM specifications
### Digital Assistants
– Vehicle Service App:
Component testing guides [5]
—
## Budget Repair Strategies
– Preventative service extends vehicle life
– Master code scanning to avoid unnecessary repairs
– Install quality alternatives when budget constrained [7]