## Common Diagnostic Trouble Codes

### P0420 Catalytic Converter Issue

– Typical Sources:

Worn catalytic converter [1]

– Common Solutions:

Replace catalytic converter https://carautorepair.site/

### P0171 System Too Lean

– Possible Defects:

Fuel delivery problems

– Troubleshooting Process:

Inspect injectors [1][7]

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## Vehicle Service Vocabulary

### ABS (Anti-Lock Brake System)

– Function: Prevents wheel lockup [7]

### Vehicle Computer System

– Responsibility: Controls ignition timing [7]

### Drivetrain Components

– Includes: Transmission [7]

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## Repair Process Steps

1. **Problem Identification**:

Conduct road test

2. **Part Evaluation**:

Measure resistance

3. **Defective Unit Swap**:

Clear error codes

4. **Post-Repair Verification**:

Test drive vehicle

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## Essential Tools

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

|—|—|—|

| OBD-II Tool | BlueDriver | Live data streaming |

| Mechanical Tools | Multimeter | Electrical testing |

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## Repair Documentation Sources

### Auto Repair Source

– Features:

Component locations [8]

Technical illustrations

### Smartphone Tools

– Auto Repair Documents:

ECU pinouts [5]

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## Budget Repair Strategies

– Preventative service extends vehicle life

– Understand DTC meanings to avoid unnecessary repairs

– Use aftermarket parts when OEM prices prohibitive [7]