## Common Diagnostic Trouble Codes

### P0420 Emissions Control Malfunction

– Typical Sources:

Exhaust leaks [1]

– Suggested Repairs:

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

### Skid Prevention Technology

– Function: Enables safe braking [7]

### Vehicle Computer System

– Responsibility: Controls ignition timing [7]

### Powertrain Elements

– Includes: Transmission [7]

—

## Repair Process Steps

1. **Initial Diagnosis**:

Perform visual inspection

2. **Component Testing**:

Measure resistance

3. **Parts Replacement**:

Use OEM parts

4. **Post-Repair Verification**:

Confirm warning light reset

—

## Critical Instruments

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

|—|—|—|

| OBD-II Tool | Innova | Retrieve DTCs |

| Physical Equipment | Smoke machine | Electrical testing |

—

## Repair Documentation Sources

### Auto Repair Source

– Features:

Component locations [8]

Technical illustrations

### Smartphone Tools

– Auto Repair Documents:

Component testing guides [5]

—

## Affordable Maintenance Advice

– Regular maintenance extends vehicle life

– Understand DTC meanings to prevent mechanic overselling

– Select certified components when OEM prices prohibitive [7]