### P0420 Emissions Control Malfunction
– Typical Sources:
Faulty oxygen sensor [1]
– Suggested Repairs:
Repair exhaust system https://carautorepair.site/
### P0171 System Too Lean
– Potential Issues:
Fuel delivery problems
– Diagnostic Steps:
Check fuel pressure [1][7]
—
## Car Maintenance Terms
### ABS (Anti-Lock Brake System)
– Function: Prevents wheel lockup [7]
### ECM/ECU (Engine Control Module)
– Role: Manages fuel injection [7]
### Transmission System Parts
– Includes: Transmission [7]
—
## Repair Process Steps
1. **Initial Diagnosis**:
Scan DTCs
2. **Part Evaluation**:
Measure resistance
3. **Parts Replacement**:
Clear error codes
4. **System Validation**:
Test drive vehicle
—
## Critical Instruments
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Diagnostic Scanner | Autel | Retrieve DTCs |
| Mechanical Tools | Multimeter | Component repair |
—
## Repair Documentation Sources
### Vehicle Service Database
– Capabilities:
TSB access [8]
Technical illustrations
### Smartphone Tools
– Auto Repair Documents:
Electrical diagrams [5]
—
## Affordable Maintenance Advice
– Regular maintenance extends vehicle life
– Master code scanning to avoid unnecessary repairs
– Install quality alternatives when budget constrained [7]
