## Common Diagnostic Trouble 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:

Vacuum leaks

– Troubleshooting Process:

Smoke test intake [1][7]

## Car Maintenance Terms

### Electronic Braking System

– Purpose: Prevents wheel lockup [7]

### ECM/ECU (Engine Control Module)

– Responsibility: Manages fuel injection [7]

### Drivetrain Components

– Contains: Differential [7]

## Mechanical Fixing Workflow

1. **Initial Diagnosis**:

Conduct road test

2. **Part Evaluation**:

Check voltage

3. **Component Installation**:

Clear error codes

4. **Final Quality Check**:

Test drive vehicle

## Necessary Equipment

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

|—|—|—|

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

| Physical Equipment | Smoke machine | Electrical testing |

## Service Information References

### Mechanical Information System

– Features:

Wiring diagrams [8]

Factory repair procedures

### Smartphone Tools

– Vehicle Service App:

Electrical diagrams [5]

## Cost-Saving Tips

– Regular maintenance avoids costly repairs

– Understand DTC meanings to avoid unnecessary repairs

– Use aftermarket parts when budget constrained [7]

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