### P0420 Catalytic Converter Issue
– Typical Sources:
Faulty oxygen sensor [1]
– Suggested Repairs:
Replace catalytic converter https://carautorepair.site/
### P0171 System Too Lean
– Potential Issues:
Faulty MAF sensor
– Diagnostic Steps:
Smoke test intake [1][7]
—
## Vehicle Service Vocabulary
### Electronic Braking System
– Function: Prevents wheel lockup [7]
### Vehicle Computer System
– Responsibility: Manages fuel injection [7]
### Transmission System Parts
– Contains: Drive axles [7]
—
## Service Procedure Stages
1. **Initial Diagnosis**:
Perform visual inspection
2. **System Verification**:
Measure resistance
3. **Component Installation**:
Clear error codes
4. **Post-Repair Verification**:
Test drive vehicle
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## Essential Tools
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Code Reader | Innova | Retrieve DTCs |
| Hand Instruments | Torque wrench | Electrical testing |
—
## Technical Data Resources
### Mechanical Information System
– Features:
TSB access [8]
Factory repair procedures
### Smartphone Tools
– Vehicle Service App:
Component testing guides [5]
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## Cost-Saving Tips
– Preventative service prevents major failures
– Learn basic diagnostics to avoid unnecessary repairs
– Use aftermarket parts when OEM prices prohibitive [7]