Infiniti Error Code P0442: How to Fix It

Q: Can I drive my Infiniti with P0442 code?

Yes, you can usually drive safely with P0442 as it's a minor leak that doesn't affect engine performance. However, you should fix it promptly to avoid emissions test failure and potential fuel economy reduction.

Q: How much does it cost to fix P0442 on an Infiniti?

Costs range from $20 for a new gas cap to $300-600 for EVAP system components. Most commonly it's a loose or damaged gas cap ($20-40) or faulty purge valve ($150-300 including labor).

Q: Will P0442 cause my Infiniti to fail emissions testing?

Yes, P0442 will typically cause your vehicle to fail emissions testing because it indicates the EVAP system isn't properly containing fuel vapors. The code must be resolved and the system must pass its readiness monitors.

Q: What's the difference between P0442 and P0455 codes?

P0442 indicates a small leak in the EVAP system, while P0455 indicates a large leak. P0442 is often caused by a loose gas cap or small hose crack, while P0455 typically indicates a major component failure or large hole.

Q: How long does it take for P0442 to clear after repair?

After fixing the issue and clearing the code, drive 50-100 miles through various conditions. The EVAP system monitor typically completes its test cycle within 1-3 drive cycles, but this can vary based on driving conditions.

Abstract

The P0442 error code on your Infiniti indicates a small leak in the EVAP (Evaporative Emission Control) system. This system captures fuel vapors from the gas tank and prevents them from entering the atmosphere, and a small leak can trigger the check engine light.