### P0420 Catalyst System Efficiency Below Threshold
– Common Causes:
Exhaust leaks [1]
– Suggested Repairs:
Replace catalytic converter https://carautorepair.site/
### P0171 Fuel Mixture Imbalance
– Likely Problems:
Faulty MAF sensor
– Testing Procedure:
Inspect injectors [1][7]
—
## Car Maintenance Terms
### Skid Prevention Technology
– Purpose: Maintains steering control [7]
### Engine Management Unit
– Responsibility: Controls ignition timing [7]
### Powertrain Elements
– Contains: Drive axles [7]
—
## Mechanical Fixing Workflow
1. **Initial Diagnosis**:
Perform visual inspection
2. **Part Evaluation**:
Measure resistance
3. **Defective Unit Swap**:
Follow torque specs
4. **Post-Repair Verification**:
Test drive vehicle
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## Necessary Equipment
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Code Reader | Innova | Live data streaming |
| Physical Equipment | Multimeter | Electrical testing |
—
## Service Information References
### Mechanical Information System
– Capabilities:
TSB access [8]
OEM specifications
### Mobile Applications
– Vehicle Service App:
Electrical diagrams [5]
—
## Affordable Maintenance Advice
– Regular maintenance extends vehicle life
– Understand DTC meanings to avoid unnecessary repairs
– Install quality alternatives when OEM prices prohibitive [7]
