### P0420 Catalytic Converter Issue
– Typical Sources:
Faulty oxygen sensor [1]
– Suggested Repairs:
Diagnose fuel trim https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Potential Issues:
Faulty MAF sensor
– Diagnostic Steps:
Smoke test intake [1][7]
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## Auto Repair Terminology
### ABS (Anti-Lock Brake System)
– Function: Enables safe braking [7]
### Engine Management Unit
– Role: Controls ignition timing [7]
### Powertrain Elements
– Includes: Differential [7]
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## Repair Process Steps
1. **Problem Identification**:
Conduct road test
2. **Part Evaluation**:
Check voltage
3. **Component Installation**:
Follow torque specs
4. **Final Quality Check**:
Test drive vehicle
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## Necessary Equipment
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| OBD-II Tool | Autel | Live data streaming |
| Physical Equipment | Smoke machine | Component repair |
—
## Service Information References
### Auto Repair Source
– Features:
TSB access [8]
OEM specifications
### Mobile Applications
– Auto Repair Documents:
Component testing guides [5]
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## Affordable Maintenance Advice
– Preventative service avoids costly repairs
– Master code scanning to prevent mechanic overselling
– Select certified components when budget constrained [7]
