### P0420 Emissions Control Malfunction
– Common Causes:
Exhaust leaks [1]
– Recommended Fixes:
Repair exhaust system https://carautorepair.site/
### P0171 System Too Lean
– Likely Problems:
Fuel delivery problems
– Diagnostic Steps:
Inspect injectors [1][7]
—
## Car Maintenance Terms
### Electronic Braking System
– Function: Enables safe braking [7]
### ECM/ECU (Engine Control Module)
– Responsibility: Controls ignition timing [7]
### Transmission System Parts
– Includes: Drive axles [7]
—
## Service Procedure Stages
1. **Problem Identification**:
Conduct road test
2. **Component Testing**:
Test continuity
3. **Parts Replacement**:
Use OEM parts
4. **System Validation**:
Test drive vehicle
—
## Necessary Equipment
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| OBD-II Tool | Innova | Retrieve DTCs |
| Physical Equipment | Multimeter | Component repair |
—
## Service Information References
### Vehicle Service Database
– Features:
Component locations [8]
Technical illustrations
### Digital Assistants
– Vehicle Service App:
ECU pinouts [5]
—
## Affordable Maintenance Advice
– Preventative service prevents major failures
– Master code scanning to prevent mechanic overselling
– Install quality alternatives when budget constrained [7]

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