## Frequent Vehicle Error Codes

### P0420 Emissions Control Malfunction

– Common Causes:

Faulty oxygen sensor [1]

– Recommended Fixes:

Diagnose fuel trim https://carautorepair.site/

### P0171 System Too Lean

– Possible Defects:

Fuel delivery problems

– Diagnostic Steps:

Inspect injectors [1][7]

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## Car Maintenance Terms

### ABS (Anti-Lock Brake System)

– Purpose: Enables safe braking [7]

### Vehicle Computer System

– Role: Monitors sensors [7]

### Drivetrain Components

– Contains: Differential [7]

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## Mechanical Fixing Workflow

1. **Initial Diagnosis**:

Scan DTCs

2. **Part Evaluation**:

Test continuity

3. **Parts Replacement**:

Clear error codes

4. **Post-Repair Verification**:

Confirm warning light reset

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## Critical Instruments

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

|—|—|—|

| Code Reader | Autel | Retrieve DTCs |

| Hand Instruments | Torque wrench | Component repair |

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## Technical Data Resources

### Vehicle Service Database

– Capabilities:

TSB access [8]

OEM specifications

### Mobile Applications

– Auto Repair Documents:

Component testing guides [5]

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## Budget Repair Strategies

– Routine checkups extends vehicle life

– Learn basic diagnostics to prevent mechanic overselling

– Install quality alternatives when OEM prices prohibitive [7]