### P0420 Emissions Control Malfunction
– Common Causes:
Worn catalytic converter [1]
– Common Solutions:
Replace catalytic converter https://carautorepair.site/
### P0171 Air-Fuel Ratio Error
– Possible Defects:
Fuel delivery problems
– Testing Procedure:
Inspect injectors [1][7]
—
## Car Maintenance Terms
### Electronic Braking System
– Function: Prevents wheel lockup [7]
### Vehicle Computer System
– Responsibility: Monitors sensors [7]
### Transmission System Parts
– Includes: Differential [7]
—
## Mechanical Fixing Workflow
1. **Initial Diagnosis**:
Scan DTCs
2. **Component Testing**:
Measure resistance
3. **Component Installation**:
Clear error codes
4. **System Validation**:
Ensure proper operation
—
## Necessary Equipment
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Code Reader | BlueDriver | Retrieve DTCs |
| Hand Instruments | Torque wrench | Component repair |
—
## Technical Data Resources
### Vehicle Service Database
– Features:
Component locations [8]
Factory repair procedures
### Smartphone Tools
– Vehicle Service App:
Component testing guides [5]
—
## Affordable Maintenance Advice
– Routine checkups prevents major failures
– Learn basic diagnostics to avoid unnecessary repairs
– Install quality alternatives when OEM prices prohibitive [7]
