### P0420 Emissions Control Malfunction
– Common Causes:
Exhaust leaks [1]
– Suggested Repairs:
Replace catalytic converter https://carautorepair.site/
### P0171 System Too Lean
– Likely Problems:
Fuel delivery problems
– Testing Procedure:
Check fuel pressure [1][7]
—
## Car Maintenance Terms
### Electronic Braking System
– Purpose: Enables safe braking [7]
### Engine Management Unit
– Responsibility: Monitors sensors [7]
### Transmission System Parts
– Includes: Differential [7]
—
## Mechanical Fixing Workflow
1. **Symptom Assessment**:
Perform visual inspection
2. **System Verification**:
Check voltage
3. **Defective Unit Swap**:
Follow torque specs
4. **System Validation**:
Ensure proper operation
—
## Essential Tools
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Diagnostic Scanner | BlueDriver | Live data streaming |
| Mechanical Tools | Multimeter | Electrical testing |
—
## Repair Documentation Sources
### Vehicle Service Database
– Features:
Wiring diagrams [8]
Factory repair procedures
### Mobile Applications
– Auto Repair Documents:
Electrical diagrams [5]
—
## Affordable Maintenance Advice
– Preventative service avoids costly repairs
– Learn basic diagnostics to avoid unnecessary repairs
– Select certified components when budget constrained [7]