## Frequent Vehicle Error Codes

### P0420 Catalytic Converter Issue

– Typical Sources:

Worn catalytic converter [1]

– Common Solutions:

Repair exhaust system https://carautorepair.site/

### P0171 Air-Fuel Ratio Error

– Likely Problems:

Faulty MAF sensor

– Testing Procedure:

Inspect injectors [1][7]

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## Vehicle Service Vocabulary

### Skid Prevention Technology

– Function: Enables safe braking [7]

### Engine Management Unit

– Responsibility: Controls ignition timing [7]

### Drivetrain Components

– Includes: Differential [7]

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## Mechanical Fixing Workflow

1. **Initial Diagnosis**:

Conduct road test

2. **System Verification**:

Measure resistance

3. **Parts Replacement**:

Clear error codes

4. **System Validation**:

Test drive vehicle

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## Necessary Equipment

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

|—|—|—|

| Diagnostic Scanner | BlueDriver | Live data streaming |

| Mechanical Tools | Multimeter | Component repair |

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## Service Information References

### Auto Repair Source

– Features:

Component locations [8]

Factory repair procedures

### Digital Assistants

– Vehicle Service App:

Electrical diagrams [5]

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## Cost-Saving Tips

– Routine checkups extends vehicle life

– Understand DTC meanings to avoid unnecessary repairs

– Use aftermarket parts when budget constrained [7]