## Frequent Vehicle Error Codes

### P0420 Catalytic Converter Issue

– Frequent Reasons:

Worn catalytic converter [1]

– Suggested Repairs:

Repair exhaust system https://carautorepair.site/

### P0171 Air-Fuel Ratio Error

– Likely Problems:

Vacuum leaks

– Troubleshooting Process:

Smoke test intake [1][7]

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## Vehicle Service Vocabulary

### ABS (Anti-Lock Brake System)

– Function: Enables safe braking [7]

### ECM/ECU (Engine Control Module)

– Responsibility: Controls ignition timing [7]

### Drivetrain Components

– Includes: Differential [7]

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## Mechanical Fixing Workflow

1. **Initial Diagnosis**:

Perform visual inspection

2. **System Verification**:

Check voltage

3. **Defective Unit Swap**:

Clear error codes

4. **Final Quality Check**:

Confirm warning light reset

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## Essential Tools

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

|—|—|—|

| Code Reader | Innova | Live data streaming |

| Mechanical Tools | Smoke machine | Component repair |

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## Repair Documentation Sources

### Mechanical Information System

– Features:

TSB access [8]

Technical illustrations

### Smartphone Tools

– Vehicle Service App:

Component testing guides [5]

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## Affordable Maintenance Advice

– Routine checkups extends vehicle life

– Master code scanning to prevent mechanic overselling

– Use aftermarket parts when budget constrained [7]