## Frequent Vehicle Error Codes

### P0420 Emissions Control Malfunction

– Frequent Reasons:

Worn catalytic converter [1]

– Suggested Repairs:

Repair exhaust system https://carautorepair.site/

### P0171 Air-Fuel Ratio Error

– Possible Defects:

Vacuum leaks

– Testing Procedure:

Smoke test intake [1][7]

## Car Maintenance Terms

### Skid Prevention Technology

– Function: Enables safe braking [7]

### Engine Management Unit

– Responsibility: Monitors sensors [7]

### Drivetrain Components

– Includes: Transmission [7]

## Repair Process Steps

1. **Problem Identification**:

Conduct road test

2. **System Verification**:

Measure resistance

3. **Parts Replacement**:

Clear error codes

4. **Post-Repair Verification**:

Ensure proper operation

## Necessary Equipment

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

|—|—|—|

| OBD-II Tool | BlueDriver | Retrieve DTCs |

| Physical Equipment | Multimeter | Electrical testing |

## Service Information References

### Mechanical Information System

– Capabilities:

Component locations [8]

OEM specifications

### Smartphone Tools

– Auto Repair Documents:

ECU pinouts [5]

## Affordable Maintenance Advice

– Routine checkups avoids costly repairs

– Learn basic diagnostics to prevent mechanic overselling

– Use aftermarket parts when budget constrained [7]

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