## Frequent Vehicle Error Codes

### P0420 Emissions Control Malfunction

– Frequent Reasons:

Worn catalytic converter [1]

– Suggested Repairs:

Repair exhaust system https://carautorepair.site/

### P0171 Air-Fuel Ratio Error

– Possible Defects:

Vacuum leaks

– Troubleshooting Process:

Smoke test intake [1][7]

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## Vehicle Service Vocabulary

### Electronic Braking System

– Function: Prevents wheel lockup [7]

### Engine Management Unit

– Responsibility: Manages fuel injection [7]

### Drivetrain Components

– Includes: Drive axles [7]

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## Repair Process Steps

1. **Initial Diagnosis**:

Conduct road test

2. **Component Testing**:

Measure resistance

3. **Parts Replacement**:

Use OEM parts

4. **Final Quality Check**:

Test drive vehicle

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## Necessary Equipment

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

|—|—|—|

| Code Reader | Autel | Live data streaming |

| Mechanical Tools | Smoke machine | Component repair |

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## Repair Documentation Sources

### Mechanical Information System

– Features:

Component locations [8]

Factory repair procedures

### Smartphone Tools

– Auto Repair Documents:

Component testing guides [5]

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## Budget Repair Strategies

– Routine checkups extends vehicle life

– Master code scanning to avoid unnecessary repairs

– Select certified components when budget constrained [7]