### P0420 Catalytic Converter Issue
– Frequent Reasons:
Exhaust leaks [1]
– Common Solutions:
Replace catalytic converter https://carautorepair.site/
### P0171 Air-Fuel Ratio Error
– Potential Issues:
Vacuum leaks
– Diagnostic Steps:
Check fuel pressure [1][7]
—
## Car Maintenance Terms
### ABS (Anti-Lock Brake System)
– Purpose: Prevents wheel lockup [7]
### ECM/ECU (Engine Control Module)
– Responsibility: Manages fuel injection [7]
### Transmission System Parts
– Includes: Drive axles [7]
—
## Service Procedure Stages
1. **Problem Identification**:
Conduct road test
2. **Part Evaluation**:
Check voltage
3. **Parts Replacement**:
Follow torque specs
4. **System Validation**:
Confirm warning light reset
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## Necessary Equipment
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Diagnostic Scanner | Innova | Live data streaming |
| Physical Equipment | Torque wrench | Component repair |
—
## Service Information References
### Mechanical Information System
– Capabilities:
Wiring diagrams [8]
Technical illustrations
### Mobile Applications
– Vehicle Service App:
Electrical diagrams [5]
—
## Budget Repair Strategies
– Preventative service avoids costly repairs
– Understand DTC meanings to prevent mechanic overselling
– Use aftermarket parts when budget constrained [7]
