## Common Diagnostic Trouble Codes

### P0420 Catalytic Converter Issue

– Typical Sources:

Exhaust leaks [1]

– Recommended Fixes:

Diagnose fuel trim https://carautorepair.site/

### P0171 System Too Lean

– Likely Problems:

Faulty MAF sensor

– Diagnostic Steps:

Check fuel pressure [1][7]

—

## Car Maintenance Terms

### Electronic Braking System

– Purpose: Prevents wheel lockup [7]

### ECM/ECU (Engine Control Module)

– Role: Monitors sensors [7]

### Transmission System Parts

– Includes: Transmission [7]

—

## Service Procedure Stages

1. **Symptom Assessment**:

Scan DTCs

2. **Part Evaluation**:

Measure resistance

3. **Parts Replacement**:

Clear error codes

4. **Final Quality Check**:

Test drive vehicle

—

## Necessary Equipment

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

|—|—|—|

| OBD-II Tool | BlueDriver | Retrieve DTCs |

| Physical Equipment | Smoke machine | Component repair |

—

## Service Information References

### Vehicle Service Database

– Capabilities:

Wiring diagrams [8]

Technical illustrations

### Smartphone Tools

– Auto Repair Documents:

Component testing guides [5]

—

## Affordable Maintenance Advice

– Routine checkups prevents major failures

– Understand DTC meanings to avoid unnecessary repairs

– Select certified components when budget constrained [7]