### P0420 Emissions Control Malfunction
– Frequent Reasons:
Worn catalytic converter [1]
– Suggested Repairs:
Replace catalytic converter https://carautorepair.site/
### P0171 System Too Lean
– Possible Defects:
Faulty MAF sensor
– Testing Procedure:
Smoke test intake [1][7]
—
## Vehicle Service Vocabulary
### Electronic Braking System
– Purpose: Enables safe braking [7]
### Vehicle Computer System
– Responsibility: Controls ignition timing [7]
### Powertrain Elements
– Contains: Differential [7]
—
## Mechanical Fixing Workflow
1. **Symptom Assessment**:
Conduct road test
2. **Part Evaluation**:
Check voltage
3. **Parts Replacement**:
Clear error codes
4. **Post-Repair Verification**:
Test drive vehicle
—
## Necessary Equipment
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Diagnostic Scanner | BlueDriver | Live data streaming |
| Mechanical Tools | Smoke machine | Electrical testing |
—
## Repair Documentation Sources
### Auto Repair Source
– Features:
Component locations [8]
Technical illustrations
### Mobile Applications
– Vehicle Service App:
ECU pinouts [5]
—
## Cost-Saving Tips
– Regular maintenance prevents major failures
– Learn basic diagnostics to prevent mechanic overselling
– Select certified components when budget constrained [7]
