## Typical Automotive DTCs

### P0420 Emissions Control Malfunction

– Typical Sources:

Worn catalytic converter [1]

– Common Solutions:

Repair exhaust system https://carautorepair.site/

### P0171 System Too Lean

– Possible Defects:

Vacuum leaks

– Troubleshooting Process:

Smoke test intake [1][7]

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## Auto Repair Terminology

### Skid Prevention Technology

– Purpose: Maintains steering control [7]

### ECM/ECU (Engine Control Module)

– Responsibility: Monitors sensors [7]

### Powertrain Elements

– Includes: Differential [7]

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## Repair Process Steps

1. **Symptom Assessment**:

Conduct road test

2. **Part Evaluation**:

Test continuity

3. **Component Installation**:

Use OEM parts

4. **System Validation**:

Confirm warning light reset

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## Essential Tools

| **Tool Type** | **Examples** | **Purpose** |

|—|—|—|

| Code Reader | Autel | Retrieve DTCs |

| Hand Instruments | Smoke machine | Component repair |

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## Service Information References

### Vehicle Service Database

– Features:

Component locations [8]

Technical illustrations

### Mobile Applications

– Auto Repair Documents:

Electrical diagrams [5]

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## Cost-Saving Tips

– Preventative service prevents major failures

– Master code scanning to avoid unnecessary repairs

– Install quality alternatives when budget constrained [7]