### P0420 Emissions Control Malfunction
– Common Causes:
Exhaust leaks [1]
– Suggested Repairs:
Repair exhaust system https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Possible Defects:
Faulty MAF sensor
– Testing Procedure:
Inspect injectors [1][7]
—
## Car Maintenance Terms
### Skid Prevention Technology
– Function: Prevents wheel lockup [7]
### ECM/ECU (Engine Control Module)
– Responsibility: Manages fuel injection [7]
### Drivetrain Components
– Includes: Differential [7]
—
## Mechanical Fixing Workflow
1. **Initial Diagnosis**:
Conduct road test
2. **Part Evaluation**:
Test continuity
3. **Parts Replacement**:
Follow torque specs
4. **Final Quality Check**:
Ensure proper operation
—
## Critical Instruments
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Diagnostic Scanner | Autel | Retrieve DTCs |
| Hand Instruments | Torque wrench | Electrical testing |
—
## Technical Data Resources
### Auto Repair Source
– Capabilities:
Component locations [8]
Factory repair procedures
### Smartphone Tools
– Auto Repair Documents:
Component testing guides [5]
—
## Affordable Maintenance Advice
– Routine checkups extends vehicle life
– Master code scanning to avoid unnecessary repairs
– Use aftermarket parts when budget constrained [7]