### P0420 Catalytic Converter Issue
– Typical Sources:
Worn catalytic converter [1]
– Recommended Fixes:
Replace catalytic converter https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Possible Defects:
Fuel delivery problems
– Troubleshooting Process:
Check fuel pressure [1][7]
—
## Auto Repair Terminology
### ABS (Anti-Lock Brake System)
– Purpose: Maintains steering control [7]
### ECM/ECU (Engine Control Module)
– Role: Manages fuel injection [7]
### Transmission System Parts
– Contains: Drive axles [7]
—
## Repair Process Steps
1. **Initial Diagnosis**:
Scan DTCs
2. **Component Testing**:
Measure resistance
3. **Component Installation**:
Use OEM parts
4. **Post-Repair Verification**:
Test drive vehicle
—
## Essential Tools
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| OBD-II Tool | Autel | Retrieve DTCs |
| Hand Instruments | Torque wrench | Electrical testing |
—
## Service Information References
### Auto Repair Source
– Features:
Wiring diagrams [8]
Technical illustrations
### Mobile Applications
– Auto Repair Documents:
Component testing guides [5]
—
## Affordable Maintenance Advice
– Preventative service extends vehicle life
– Learn basic diagnostics to avoid unnecessary repairs
– Use aftermarket parts when OEM prices prohibitive [7]