### P0420 Emissions Control Malfunction
– Common Causes:
Exhaust leaks [1]
– Recommended Fixes:
Repair exhaust system https://carautorepair.site/
### P0171 System Too Lean
– Potential Issues:
Vacuum leaks
– Diagnostic Steps:
Check fuel pressure [1][7]
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## Auto Repair Terminology
### Electronic Braking System
– Purpose: Maintains steering control [7]
### ECM/ECU (Engine Control Module)
– Role: Monitors sensors [7]
### Drivetrain Components
– Contains: Drive axles [7]
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## Mechanical Fixing Workflow
1. **Problem Identification**:
Perform visual inspection
2. **Component Testing**:
Check voltage
3. **Component Installation**:
Follow torque specs
4. **Post-Repair Verification**:
Test drive vehicle
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## Necessary Equipment
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| OBD-II Tool | BlueDriver | Live data streaming |
| Physical Equipment | Multimeter | Component repair |
—
## Repair Documentation Sources
### Auto Repair Source
– Capabilities:
TSB access [8]
Factory repair procedures
### Digital Assistants
– Auto Repair Documents:
ECU pinouts [5]
—
## Cost-Saving Tips
– Routine checkups prevents major failures
– Learn basic diagnostics to avoid unnecessary repairs
– Use aftermarket parts when budget constrained [7]