### P0420 Catalytic Converter Issue
– Typical Sources:
Faulty oxygen sensor [1]
– Recommended Fixes:
Repair exhaust system https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Possible Defects:
Faulty MAF sensor
– Diagnostic Steps:
Inspect injectors [1][7]
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## Car Maintenance Terms
### Electronic Braking System
– Function: Prevents wheel lockup [7]
### Vehicle Computer System
– Role: Controls ignition timing [7]
### Powertrain Elements
– Includes: Differential [7]
—
## Mechanical Fixing Workflow
1. **Problem Identification**:
Perform visual inspection
2. **System Verification**:
Check voltage
3. **Parts Replacement**:
Clear error codes
4. **Final Quality Check**:
Test drive vehicle
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## Essential Tools
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Code Reader | Innova | Retrieve DTCs |
| Hand Instruments | Torque wrench | Electrical testing |
—
## Technical Data Resources
### Mechanical Information System
– Capabilities:
TSB access [8]
Factory repair procedures
### Digital Assistants
– Vehicle Service App:
ECU pinouts [5]
—
## Budget Repair Strategies
– Routine checkups avoids costly repairs
– Master code scanning to prevent mechanic overselling
– Install quality alternatives when OEM prices prohibitive [7]