### P0420 Catalytic Converter Issue
– Typical Sources:
Faulty oxygen sensor [1]
– Recommended Fixes:
Diagnose fuel trim https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Likely Problems:
Fuel delivery problems
– Troubleshooting Process:
Check fuel pressure [1][7]
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## Vehicle Service Vocabulary
### ABS (Anti-Lock Brake System)
– Purpose: Prevents wheel lockup [7]
### ECM/ECU (Engine Control Module)
– Responsibility: Controls ignition timing [7]
### Transmission System Parts
– Contains: Transmission [7]
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## Mechanical Fixing Workflow
1. **Initial Diagnosis**:
Perform visual inspection
2. **Component Testing**:
Check voltage
3. **Component Installation**:
Use OEM parts
4. **Post-Repair Verification**:
Test drive vehicle
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## Critical Instruments
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Code Reader | Innova | Live data streaming |
| Physical Equipment | Multimeter | Electrical testing |
—
## Repair Documentation Sources
### Vehicle Service Database
– Capabilities:
Wiring diagrams [8]
OEM specifications
### Smartphone Tools
– Auto Repair Documents:
Component testing guides [5]
—
## Budget Repair Strategies
– Preventative service avoids costly repairs
– Understand DTC meanings to prevent mechanic overselling
– Select certified components when budget constrained [7]
