### P0420 Emissions Control Malfunction
– Frequent Reasons:
Worn catalytic converter [1]
– Suggested Repairs:
Repair exhaust system https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Potential Issues:
Vacuum leaks
– Diagnostic Steps:
Smoke test intake [1][7]
—
## Vehicle Service Vocabulary
### ABS (Anti-Lock Brake System)
– Purpose: Enables safe braking [7]
### ECM/ECU (Engine Control Module)
– Responsibility: Manages fuel injection [7]
### Powertrain Elements
– Includes: Drive axles [7]
—
## Mechanical Fixing Workflow
1. **Symptom Assessment**:
Perform visual inspection
2. **Component Testing**:
Test continuity
3. **Parts Replacement**:
Clear error codes
4. **Post-Repair Verification**:
Ensure proper operation
—
## Critical Instruments
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| OBD-II Tool | Autel | Retrieve DTCs |
| Mechanical Tools | Torque wrench | Component repair |
—
## Technical Data Resources
### Auto Repair Source
– Features:
TSB access [8]
Factory repair procedures
### Digital Assistants
– Auto Repair Documents:
ECU pinouts [5]
—
## Budget Repair Strategies
– Regular maintenance avoids costly repairs
– Master code scanning to avoid unnecessary repairs
– Select certified components when OEM prices prohibitive [7]
