## Common Diagnostic Trouble Codes

### P0420 Catalytic Converter Issue

– Common Causes:

Exhaust leaks [1]

– Common Solutions:

Diagnose fuel trim https://carautorepair.site/

### P0171 System Too Lean

– Likely Problems:

Faulty MAF sensor

– Diagnostic Steps:

Inspect injectors [1][7]

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## Vehicle Service Vocabulary

### ABS (Anti-Lock Brake System)

– Purpose: Enables safe braking [7]

### Vehicle Computer System

– Role: Manages fuel injection [7]

### Transmission System Parts

– Includes: Transmission [7]

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## Mechanical Fixing Workflow

1. **Problem Identification**:

Perform visual inspection

2. **Component Testing**:

Measure resistance

3. **Component Installation**:

Follow torque specs

4. **System Validation**:

Confirm warning light reset

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## Critical Instruments

| **Tool Type** | **Examples** | **Purpose** |

|—|—|—|

| Code Reader | Autel | Retrieve DTCs |

| Physical Equipment | Smoke machine | Electrical testing |

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## Service Information References

### Auto Repair Source

– Capabilities:

TSB access [8]

Factory repair procedures

### Mobile Applications

– Auto Repair Documents:

ECU pinouts [5]

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## Affordable Maintenance Advice

– Routine checkups avoids costly repairs

– Understand DTC meanings to avoid unnecessary repairs

– Use aftermarket parts when budget constrained [7]