### P0420 Catalytic Converter Issue
– Typical Sources:
Faulty oxygen sensor [1]
– Recommended Fixes:
Repair exhaust system https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Potential Issues:
Faulty MAF sensor
– Testing Procedure:
Inspect injectors [1][7]
—
## Car Maintenance Terms
### Electronic Braking System
– Function: Enables safe braking [7]
### Vehicle Computer System
– Role: Controls ignition timing [7]
### Drivetrain Components
– Contains: Differential [7]
—
## Service Procedure Stages
1. **Problem Identification**:
Perform visual inspection
2. **System Verification**:
Check voltage
3. **Defective Unit Swap**:
Clear error codes
4. **System Validation**:
Ensure proper operation
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## Necessary Equipment
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| OBD-II Tool | Innova | Retrieve DTCs |
| Hand Instruments | Smoke machine | Electrical testing |
—
## Service Information References
### Vehicle Service Database
– Capabilities:
Wiring diagrams [8]
Factory repair procedures
### Digital Assistants
– Vehicle Service App:
Component testing guides [5]
—
## Affordable Maintenance Advice
– Routine checkups avoids costly repairs
– Master code scanning to avoid unnecessary repairs
– Use aftermarket parts when OEM prices prohibitive [7]