### P0420 Catalytic Converter Issue
– Typical Sources:
Faulty oxygen sensor [1]
– Recommended Fixes:
Replace catalytic converter https://carautorepair.site/
### P0171 Air-Fuel Ratio Error
– Likely Problems:
Faulty MAF sensor
– Testing Procedure:
Smoke test intake [1][7]
—
## Car Maintenance Terms
### Skid Prevention Technology
– Function: Enables safe braking [7]
### Vehicle Computer System
– Role: Monitors sensors [7]
### Powertrain Elements
– Includes: Differential [7]
—
## Service Procedure Stages
1. **Initial Diagnosis**:
Conduct road test
2. **Component Testing**:
Test continuity
3. **Component Installation**:
Follow torque specs
4. **Final Quality Check**:
Confirm warning light reset
—
## Critical Instruments
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Code Reader | Innova | Live data streaming |
| Physical Equipment | Smoke machine | Component repair |
—
## Technical Data Resources
### Vehicle Service Database
– Capabilities:
Component locations [8]
Technical illustrations
### Smartphone Tools
– Auto Repair Documents:
Component testing guides [5]
—
## Cost-Saving Tips
– Routine checkups prevents major failures
– Master code scanning to avoid unnecessary repairs
– Install quality alternatives when OEM prices prohibitive [7]
