P0442 2004 Infiniti G35 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 2004 Infiniti G35 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 2004 Infiniti G35 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 2004 Infiniti G35?
- 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 2004 Infiniti G35?
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 2004 Infiniti G35 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.
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Frequently Asked Questions about P0442 2004 Infiniti G35 Code
1. What does OBDII code P0442 mean in a 2004 Infiniti G35?
Code P0442 indicates that the EVAP system has detected a small leak in the system, specifically in the evaporative emission control system.
2. What are common symptoms of OBDII code P0442 on a 2004 Infiniti G35?
Common symptoms may include the illumination of the check engine light on the dashboard and a slight fuel odor near the vehicle.
3. What are possible causes of OBDII code P0442 in a 2004 Infiniti G35?
Potential causes of code P0442 can include a loose or damaged gas cap, a leak in the EVAP system hoses, a faulty EVAP canister vent valve, or a malfunctioning EVAP purge valve.
4. How serious is OBDII code P0442 in a 2004 Infiniti G35?
While code P0442 is not an emergency situation, it is important to address it promptly to prevent potential issues with emissions and fuel efficiency.
5. Can OBDII code P0442 in a 2004 Infiniti G35 cause any other problems?
If left unaddressed, code P0442 can lead to increased emissions, decreased fuel efficiency, and potential issues with passing emissions tests.
6. How can I diagnose OBDII code P0442 in my 2004 Infiniti G35?
Diagnosing code P0442 typically involves checking the gas cap for tightness, inspecting the EVAP system hoses for leaks, and testing the EVAP canister vent valve and purge valve for proper operation.
7. How can I repair OBDII code P0442 in a 2004 Infiniti G35?
Repairing code P0442 may involve tightening or replacing the gas cap, repairing or replacing damaged EVAP system hoses, and replacing faulty components such as the EVAP canister vent valve or purge valve.
8. Can I reset OBDII code P0442 in my 2004 Infiniti G35 without fixing the issue?
While you can clear the code with an OBDII scanner, it is recommended to address the underlying problem causing code P0442 to prevent future issues.
9. Are there any DIY tips for addressing OBDII code P0442 in a 2004 Infiniti G35?
DIY tips include checking the gas cap for proper sealing, visually inspecting EVAP system hoses for damage, and testing the EVAP canister vent valve and purge valve for functionality.
10. How much does it typically cost to fix OBDII code P0442 in a 2004 Infiniti G35?
The cost of fixing code P0442 can vary depending on the specific cause of the issue, but it may range from around $100 for a simple fix like a gas cap replacement to several hundred dollars for more complex repairs involving EVAP system components.
Discuss the causes and fixes for P0442 2004 Infiniti G35 OBDII Code
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