### P0420 Catalytic Converter Issue
– Frequent Reasons:
Faulty oxygen sensor [1]
– Common Solutions:
Diagnose fuel trim https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Potential Issues:
Fuel delivery problems
– Testing Procedure:
Inspect injectors [1][7]
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## Auto Repair Terminology
### Skid Prevention Technology
– Purpose: Prevents wheel lockup [7]
### Engine Management Unit
– Role: Monitors sensors [7]
### Powertrain Elements
– Contains: Transmission [7]
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## Repair Process Steps
1. **Problem Identification**:
Perform visual inspection
2. **System Verification**:
Measure resistance
3. **Component Installation**:
Clear error codes
4. **Post-Repair Verification**:
Test drive vehicle
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## Essential Tools
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Code Reader | Innova | Retrieve DTCs |
| Physical Equipment | Multimeter | Component repair |
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## Repair Documentation Sources
### Auto Repair Source
– Capabilities:
Wiring diagrams [8]
OEM specifications
### Digital Assistants
– 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]