### P0420 Emissions Control Malfunction
– Frequent Reasons:
Exhaust leaks [1]
– Suggested Repairs:
Diagnose fuel trim https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Likely Problems:
Fuel delivery problems
– Diagnostic Steps:
Inspect injectors [1][7]
—
## Auto Repair Terminology
### Skid Prevention Technology
– Function: Maintains steering control [7]
### ECM/ECU (Engine Control Module)
– Responsibility: Controls ignition timing [7]
### Transmission System Parts
– Includes: Differential [7]
—
## Service Procedure Stages
1. **Symptom Assessment**:
Conduct road test
2. **Component Testing**:
Check voltage
3. **Parts Replacement**:
Use OEM parts
4. **Final Quality Check**:
Confirm warning light reset
—
## Critical Instruments
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| OBD-II Tool | BlueDriver | Live data streaming |
| Physical Equipment | Multimeter | Electrical testing |
—
## Technical Data Resources
### Vehicle Service Database
– Features:
Component locations [8]
Factory repair procedures
### Smartphone Tools
– Vehicle Service App:
Electrical diagrams [5]
—
## Affordable Maintenance Advice
– Routine checkups prevents major failures
– Learn basic diagnostics to avoid unnecessary repairs
– Select certified components when OEM prices prohibitive [7]
