### P0420 Emissions Control Malfunction
– Frequent Reasons:
Worn catalytic converter [1]
– Recommended Fixes:
Repair exhaust system https://carautorepair.site/
### P0171 System Too Lean
– Possible Defects:
Faulty MAF sensor
– Testing Procedure:
Inspect injectors [1][7]
—
## Auto Repair Terminology
### Electronic Braking System
– Purpose: Enables safe braking [7]
### ECM/ECU (Engine Control Module)
– Responsibility: Manages fuel injection [7]
### Transmission System Parts
– Includes: Transmission [7]
—
## Repair Process Steps
1. **Initial Diagnosis**:
Perform visual inspection
2. **Part Evaluation**:
Test continuity
3. **Parts Replacement**:
Follow torque specs
4. **Final Quality Check**:
Ensure proper operation
—
## Essential Tools
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Code Reader | BlueDriver | Retrieve DTCs |
| Mechanical Tools | Multimeter | Electrical testing |
—
## Technical Data Resources
### Auto Repair Source
– Capabilities:
TSB access [8]
OEM specifications
### Smartphone Tools
– Vehicle Service App:
Electrical diagrams [5]
—
## Affordable Maintenance Advice
– Preventative service avoids costly repairs
– Understand DTC meanings to avoid unnecessary repairs
– Install quality alternatives when budget constrained [7]