## Common Diagnostic Trouble Codes

### P0420 Catalytic Converter Issue

– Common Causes:

Worn catalytic converter [1]

– Suggested Repairs:

Replace catalytic converter https://carautorepair.site/

### P0171 Fuel Mixture Imbalance

– Potential Issues:

Vacuum leaks

– Testing Procedure:

Smoke test intake [1][7]

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## Vehicle Service Vocabulary

### Electronic Braking System

– Purpose: Enables safe braking [7]

### ECM/ECU (Engine Control Module)

– Role: Controls ignition timing [7]

### Transmission System Parts

– Contains: Drive axles [7]

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## Service Procedure Stages

1. **Initial Diagnosis**:

Conduct road test

2. **Part Evaluation**:

Test continuity

3. **Component Installation**:

Follow torque specs

4. **Post-Repair Verification**:

Test drive vehicle

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## Essential Tools

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

|—|—|—|

| OBD-II Tool | BlueDriver | Retrieve DTCs |

| Hand Instruments | Torque wrench | Electrical testing |

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## Technical Data Resources

### Vehicle Service Database

– Capabilities:

Component locations [8]

Technical illustrations

### Digital Assistants

– Vehicle Service App:

ECU pinouts [5]

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## Budget Repair Strategies

– Regular maintenance avoids costly repairs

– Understand DTC meanings to prevent mechanic overselling

– Use aftermarket parts when budget constrained [7]