## Typical Automotive DTCs

### P0420 Emissions Control Malfunction

– Common Causes:

Faulty oxygen sensor [1]

– Common Solutions:

Replace catalytic converter https://carautorepair.site/

### P0171 Fuel Mixture Imbalance

– Potential Issues:

Faulty MAF sensor

– Diagnostic Steps:

Check fuel pressure [1][7]

## Auto Repair Terminology

### ABS (Anti-Lock Brake System)

– Function: Maintains steering control [7]

### Vehicle Computer System

– Role: Monitors sensors [7]

### Transmission System Parts

– Includes: Transmission [7]

## Repair Process Steps

1. **Symptom Assessment**:

Perform visual inspection

2. **System Verification**:

Measure resistance

3. **Defective Unit Swap**:

Use OEM parts

4. **Post-Repair Verification**:

Test drive vehicle

## Critical Instruments

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

|—|—|—|

| Diagnostic Scanner | Autel | Live data streaming |

| Hand Instruments | Smoke machine | Component repair |

## Service Information References

### Mechanical Information System

– Features:

Wiring diagrams [8]

OEM specifications

### Mobile Applications

– Auto Repair Documents:

Component testing guides [5]

## Budget Repair Strategies

– Routine checkups extends vehicle life

– Understand DTC meanings to avoid unnecessary repairs

– Select certified components when OEM prices prohibitive [7]

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