# Diagnostic Report for 2002 Nissan Pathfinder
## Symptoms
- Loss of power
- Multiple check engine codes (EVAP, misfires, catalytic converter efficiency)
- Misfiring in cylinder #2
- Hollowed out catalytic converters
## Potential Causes and Analysis
1. **Dropped Socket in Intake**
- The 10mm socket dropped into the intake and ejected into the plenum likely caused damage, particularly to cylinder #2. This explains the P0302 (cylinder 2 misfire) code.
- Debris may have scored the cylinder walls or damaged valves/piston.
2. **EVAP System Issues**
- P0447 code indicates an issue with the EVAP vent control circuit, likely a stuck or faulty vent valve.
- This can cause fuel vapor to build up, affecting engine performance.
3. **Catalytic Converter Damage**
- Hollowed out catalysts explain P0420 and P0430 codes (catalyst efficiency below threshold).
- Likely damaged by prolonged misfiring and/or overheating.
4. **General Misfire Issues**
- P0300 (random/multiple cylinder misfire) suggests a systemic problem.
- Could be fuel delivery, ignition system, or vacuum leak related.
## Recommended Actions
1. **Inspect Cylinder #2**
- Perform a compression test and borescope inspection of cylinder #2.
- Check for scoring or debris that may have caused damage.
2. **EVAP System Diagnosis**
- Test the EVAP vent valve and associated wiring.
- Inspect EVAP lines for blockages or leaks.
3. **Catalytic Converter Replacement**
- Both catalytic converters will need replacement to resolve P0420/P0430 codes.
- Ensure underlying misfire issues are resolved first to prevent damage to new catalysts.
4. **Fuel System Check**
- Verify fuel pressure and injector performance.
- Consider cleaning or replacing fuel injectors.
5. **Vacuum System Inspection**
- Check for vacuum leaks, particularly around the intake manifold where the socket was ejected.
6. **Further Misfire Diagnosis**
- If misfires persist after above steps, consider checking valve timing and internal engine components.
## Additional Notes
- The P01130 and P01490 codes are likely related to the O2 sensor readings being affected by the damaged catalysts and misfires.
- Resolving the misfire and EVAP issues should be prioritized before replacing the catalytic converters.
- A professional inspection is highly recommended given the complexity of issues and potential internal engine damage.
Notis
Mini tools
Open# Diagnostic Report for 2002 Nissan Pathfinder ## Symptoms - Loss of power - Multiple check engine codes (EVAP, misfires, catalytic converter efficiency) - Misfiring in cylinder #2 - Hollowed out catalytic converters ## Potential Causes and Analysis 1. **Dropped Socket in Intake** - The 10mm socket dropped into the intake and ejected into the plenum likely caused damage, particularly to cylinder #2. This explains the P0302 (cylinder 2 misfire) code. - Debris may have scored the cylinder walls or damaged valves/piston. 2. **EVAP System Issues** - P0447 code indicates an issue with the EVAP vent control circuit, likely a stuck or faulty vent valve. - This can cause fuel vapor to build up, affecting engine performance. 3. **Catalytic Converter Damage** - Hollowed out catalysts explain P0420 and P0430 codes (catalyst efficiency below threshold). - Likely damaged by prolonged misfiring and/or overheating. 4. **General Misfire Issues** - P0300 (random/multiple cylinder misfire) suggests a systemic problem. - Could be fuel delivery, ignition system, or vacuum leak related. ## Recommended Actions 1. **Inspect Cylinder #2** - Perform a compression test and borescope inspection of cylinder #2. - Check for scoring or debris that may have caused damage. 2. **EVAP System Diagnosis** - Test the EVAP vent valve and associated wiring. - Inspect EVAP lines for blockages or leaks. 3. **Catalytic Converter Replacement** - Both catalytic converters will need replacement to resolve P0420/P0430 codes. - Ensure underlying misfire issues are resolved first to prevent damage to new catalysts. 4. **Fuel System Check** - Verify fuel pressure and injector performance. - Consider cleaning or replacing fuel injectors. 5. **Vacuum System Inspection** - Check for vacuum leaks, particularly around the intake manifold where the socket was ejected. 6. **Further Misfire Diagnosis** - If misfires persist after above steps, consider checking valve timing and internal engine components. ## Additional Notes - The P01130 and P01490 codes are likely related to the O2 sensor readings being affected by the damaged catalysts and misfires. - Resolving the misfire and EVAP issues should be prioritized before replacing the catalytic converters. - A professional inspection is highly recommended given the complexity of issues and potential internal engine damage.
