### P0420 Emissions Control Malfunction
– Frequent Reasons:
Exhaust leaks [1]
– Common Solutions:
Diagnose fuel trim https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Potential Issues:
Faulty MAF sensor
– Diagnostic Steps:
Inspect injectors [1][7]
—
## Vehicle Service Vocabulary
### ABS (Anti-Lock Brake System)
– Function: Enables safe braking [7]
### Engine Management Unit
– Responsibility: Monitors sensors [7]
### Drivetrain Components
– Contains: Differential [7]
—
## Mechanical Fixing Workflow
1. **Problem Identification**:
Conduct road test
2. **Component Testing**:
Check voltage
3. **Defective Unit Swap**:
Clear error codes
4. **Post-Repair Verification**:
Ensure proper operation
—
## Necessary Equipment
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Code Reader | Innova | Live data streaming |
| Mechanical Tools | Smoke machine | Component repair |
—
## Repair Documentation Sources
### Mechanical Information System
– Capabilities:
Component locations [8]
OEM specifications
### Smartphone Tools
– Vehicle Service App:
Component testing guides [5]
—
## Cost-Saving Tips
– Regular maintenance avoids costly repairs
– Understand DTC meanings to avoid unnecessary repairs
– Install quality alternatives when budget constrained [7]
