### P0420 Catalytic Converter Issue
– Common Causes:
Faulty oxygen sensor [1]
– Suggested Repairs:
Diagnose fuel trim https://carautorepair.site/
### P0171 System Too Lean
– Likely Problems:
Fuel delivery problems
– Troubleshooting Process:
Inspect injectors [1][7]
—
## Vehicle Service Vocabulary
### Electronic Braking System
– Function: Enables safe braking [7]
### Engine Management Unit
– Responsibility: Controls ignition timing [7]
### Transmission System Parts
– Includes: Transmission [7]
—
## Mechanical Fixing Workflow
1. **Problem Identification**:
Perform visual inspection
2. **Part Evaluation**:
Measure resistance
3. **Component Installation**:
Clear error codes
4. **Final Quality Check**:
Ensure proper operation
—
## Critical Instruments
| **Tool Type** | **Examples** | **Purpose** |
|—|—|—|
| Diagnostic Scanner | Innova | Live data streaming |
| Physical Equipment | Multimeter | Component repair |
—
## Repair Documentation Sources
### Auto Repair Source
– Features:
TSB access [8]
Technical illustrations
### Digital Assistants
– Vehicle Service App:
Electrical diagrams [5]
—
## Affordable Maintenance Advice
– Routine checkups avoids costly repairs
– Master code scanning to avoid unnecessary repairs
– Use aftermarket parts when budget constrained [7]
