## Frequent Vehicle Error Codes

### P0420 Catalytic Converter Issue

– Common Causes:

Exhaust leaks [1]

– Suggested Repairs:

Diagnose fuel trim https://carautorepair.site/

### P0171 System Too Lean

– Possible Defects:

Fuel delivery problems

– Testing Procedure:

Smoke test intake [1][7]

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## Car Maintenance Terms

### Skid Prevention Technology

– Purpose: Enables safe braking [7]

### Engine Management Unit

– Role: Controls ignition timing [7]

### Powertrain Elements

– Contains: Transmission [7]

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## Repair Process Steps

1. **Problem Identification**:

Scan DTCs

2. **System Verification**:

Measure resistance

3. **Defective Unit Swap**:

Follow torque specs

4. **Final Quality Check**:

Test drive vehicle

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## Essential Tools

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

|—|—|—|

| Diagnostic Scanner | Innova | Live data streaming |

| Physical Equipment | Multimeter | Electrical testing |

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## Technical Data Resources

### Mechanical Information System

– Features:

TSB access [8]

OEM specifications

### Digital Assistants

– Auto Repair Documents:

ECU pinouts [5]

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## Cost-Saving Tips

– Preventative service prevents major failures

– Master code scanning to prevent mechanic overselling

– Install quality alternatives when OEM prices prohibitive [7]