### P0420 Emissions Control Malfunction
– Common Causes:
Worn catalytic converter [1]
– Suggested Repairs:
Repair exhaust system https://carautorepair.site/
### P0171 Air-Fuel Ratio Error
– Likely Problems:
Fuel delivery problems
– Diagnostic Steps:
Inspect injectors [1][7]
—
## Car Maintenance Terms
### Skid Prevention Technology
– Function: Maintains steering control [7]
### ECM/ECU (Engine Control Module)
– Responsibility: Manages fuel injection [7]
### Transmission System Parts
– Includes: Differential [7]
—
## Service Procedure Stages
1. **Initial Diagnosis**:
Conduct road test
2. **Component Testing**:
Measure resistance
3. **Parts Replacement**:
Clear error codes
4. **Final Quality Check**:
Test drive vehicle
—
## Necessary Equipment
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Code Reader | BlueDriver | Retrieve DTCs |
| Mechanical Tools | Torque wrench | Component repair |
—
## Technical Data Resources
### Auto Repair Source
– Capabilities:
TSB access [8]
Technical illustrations
### Digital Assistants
– Vehicle Service App:
ECU pinouts [5]
—
## Affordable Maintenance Advice
– Preventative service prevents major failures
– Learn basic diagnostics to prevent mechanic overselling
– Select certified components when budget constrained [7]
