## Typical Automotive DTCs

### P0420 Emissions Control Malfunction

– Frequent Reasons:

Worn catalytic converter [1]

– Suggested Repairs:

Diagnose fuel trim https://carautorepair.site/

### P0171 Fuel Mixture Imbalance

– Possible Defects:

Faulty MAF sensor

– Testing Procedure:

Smoke test intake [1][7]

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## Vehicle Service Vocabulary

### Skid Prevention Technology

– Purpose: Prevents wheel lockup [7]

### ECM/ECU (Engine Control Module)

– Role: Monitors sensors [7]

### Powertrain Elements

– Includes: Differential [7]

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## Repair Process Steps

1. **Symptom Assessment**:

Perform visual inspection

2. **System Verification**:

Check voltage

3. **Parts Replacement**:

Clear error codes

4. **Final Quality Check**:

Ensure proper operation

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## Necessary Equipment

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

|—|—|—|

| Code Reader | Innova | Retrieve DTCs |

| Mechanical Tools | Torque wrench | Electrical testing |

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## Technical Data Resources

### Mechanical Information System

– Capabilities:

TSB access [8]

Factory repair procedures

### Digital Assistants

– Vehicle Service App:

ECU pinouts [5]

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## Cost-Saving Tips

– Routine checkups prevents major failures

– Learn basic diagnostics to avoid unnecessary repairs

– Install quality alternatives when budget constrained [7]