### P0420 Catalytic Converter Issue
– Typical Sources:
Faulty oxygen sensor [1]
– Suggested Repairs:
Diagnose fuel trim https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Potential Issues:
Fuel delivery problems
– Testing Procedure:
Check fuel pressure [1][7]
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## Vehicle Service Vocabulary
### Skid Prevention Technology
– Purpose: Prevents wheel lockup [7]
### ECM/ECU (Engine Control Module)
– Responsibility: Monitors sensors [7]
### Powertrain Elements
– Contains: Drive axles [7]
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## Service Procedure Stages
1. **Problem Identification**:
Perform visual inspection
2. **Component Testing**:
Test continuity
3. **Component Installation**:
Use OEM parts
4. **Post-Repair Verification**:
Test drive vehicle
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## Necessary Equipment
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| OBD-II Tool | Autel | Retrieve DTCs |
| Mechanical Tools | Smoke machine | Component repair |
—
## Technical Data Resources
### Mechanical Information System
– Capabilities:
Component locations [8]
Factory repair procedures
### Mobile Applications
– Auto Repair Documents:
Electrical diagrams [5]
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## Affordable Maintenance Advice
– Regular maintenance extends vehicle life
– Master code scanning to avoid unnecessary repairs
– Select certified components when budget constrained [7]