P0442 Infiniti Code - EVAP Control System Leak Detected Small Leak
Quick Answer
The Engine Control Module (ECM) tests the Evaporative Emission (EVAP) system for the following conditions: - Large and small leaks - Excess vacuum - Purge flow during non-commanded conditions - Fuel Level and Fuel Pressure sensor faults - EVAP Purge and Vent Valve faults The ECM monitors the Fuel Tank Pressure sensor in order to determine the level of vacuum/pressure in the EVAP system. Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- P0442 Infiniti indicates EVAP Control System Leak Detected Small Leak.
- Common causes
- Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code P0442 Infiniti Description
- Large and small leaks
- Excess vacuum
- Purge flow during non-commanded conditions
- Fuel Level and Fuel Pressure sensor faults
- EVAP Purge and Vent Valve faults
The ECM monitors the Fuel Tank Pressure sensor in order to determine the level of vacuum/pressure in the EVAP system. The ECM commands both the EVAP Purge Solenoid and the EVAP Vent Valve ON when the conditions are met in order to apply an engine vacuum to the EVAP system. The ECM commands the EVAP Purge Solenoid OFF once the system has reached a predetermined level of vacuum. This test verifies if a vacuum can be achieved in the EVAP system. Failure to develop a vacuum may be caused by a large leak or a restriction.
What are the Possible Causes of the DTC P0442 Infiniti?
- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking
How to Fix the DTC P0442 Infiniti?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
There is an Infiniti Service Bulletin to help diagnose the P0442 code:
Infiniti Factory Service Bulletin OBDII Code P0442
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0442 Infiniti code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P0442 Infiniti code?
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Information for Specific Infiniti Models
- P0442 2003 Infiniti G35 — EVAP Control System Leak Detected Small Leak
- P0442 2004 Infiniti G35 — EVAP Control System Leak Detected Small Leak
- P0442 2005 Infiniti G35 — EVAP Control System Leak Detected Small Leak
- P0442 2006 Infiniti G35 — EVAP Control System Leak Detected Small Leak
Frequently Asked Questions about P0442 Infiniti Code
1. What are common symptoms of an OBDII code P0442 in an Infiniti?
The most common symptoms of a P0442 code in an Infiniti include the check engine light coming on, a noticeable fuel smell near the vehicle, and potential issues with the car's evaporative emissions system.
2. What are the possible causes of an EVAP control system small leak in an Infiniti?
Potential causes of a P0442 code in an Infiniti include a loose gas cap, a cracked or damaged charcoal canister, a faulty purge valve, or leaks in the EVAP system hoses.
3. How serious is a P0442 OBDII code in an Infiniti?
While a P0442 code is not an emergency, it should not be ignored. Ignoring this code could lead to increased emissions, decreased fuel efficiency, and potential damage to other components of the vehicle's emissions system.
4. Can I continue driving my Infiniti with a P0442 code?
It is generally safe to drive your Infiniti with a P0442 code, but it is recommended to have the issue diagnosed and repaired as soon as possible to prevent any potential long-term damage to the vehicle's emissions system.
5. How can I diagnose a small EVAP system leak in my Infiniti?
Diagnosing a small EVAP leak in an Infiniti typically involves inspecting the gas cap for tightness, visually checking the EVAP system components for damage, and using a smoke machine to detect leaks in the system.
6. Will a P0442 code reset itself in an Infiniti?
A P0442 code may reset itself if the underlying issue is resolved, such as tightening the gas cap. However, it is recommended to have the code properly diagnosed and repaired to prevent it from recurring.
7. How much does it cost to repair a P0442 code in an Infiniti?
The cost of repairing a P0442 code in an Infiniti can vary depending on the specific cause of the issue. Repairs may range from simply tightening the gas cap to replacing components like the charcoal canister or purge valve.
8. Can I clear a P0442 code in my Infiniti with an OBDII scanner?
Yes, you can clear a P0442 code in your Infiniti using an OBDII scanner. However, it is important to address the underlying issue causing the code to prevent it from reoccurring.
9. Are there any DIY repair tips for fixing a P0442 code in an Infiniti?
Some DIY repair tips for a P0442 code in an Infiniti include checking and tightening the gas cap, visually inspecting the EVAP system components for damage, and ensuring all hoses are properly connected.
10. How long does it take to repair a P0442 code in an Infiniti?
The time it takes to repair a P0442 code in an Infiniti can vary based on the specific cause of the issue and the extent of the repairs needed. Simple fixes like tightening the gas cap may only take a few minutes, while more complex repairs could take longer.
Discuss the causes and fixes for P0442 Infiniti OBDII Code
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Replaced crankshaft position sensor on 2004 Infiniti G35 car still long starting won't turn over
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Also code is PO335 and shows when I read on O2 sensor...EVAP...Misfire etc.,...
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P0442 code related components should not cause a lon starting problem. Have you check the fuel pressure? Unfortunately there are many things that could cause that problem, low fuel pressure, low battery voltage, bad starter, bad camshaft position sensor. I suggest starting with the fuel pressure.
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