P0442 2006 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 2006 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 2006 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 2006 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 2006 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 2006 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 2006 Infiniti G35 Code
1. What does the OBDII code P0442 mean on a 2006 Infiniti G35?
P0442 indicates a small leak in the EVAP (Evaporative Emission Control) system, which prevents fuel vapors from escaping into the atmosphere.
2. What are the common symptoms of P0442 on a 2006 Infiniti G35?
Symptoms may include the check engine light turning on, a slight fuel smell near the vehicle, and potentially reduced fuel efficiency. There are often no noticeable performance issues.
3. What causes the P0442 code to appear on a 2006 Infiniti G35?
Common causes include a loose or damaged gas cap, cracked or disconnected EVAP hoses, a faulty purge valve, or a malfunctioning charcoal canister.
4. Can a loose gas cap trigger the P0442 code on my Infiniti G35?
Yes, a loose, damaged, or improperly sealed gas cap is one of the most frequent causes of the P0442 code.
5. How do I diagnose the P0442 code on a 2006 Infiniti G35?
Start by checking the gas cap for damage or looseness. Then inspect EVAP hoses for cracks or disconnections, and use a smoke test to locate leaks if necessary.
6. Is it safe to drive with the P0442 code on my Infiniti G35?
Yes, it is usually safe to drive with this code, as it doesn't typically affect performance. However, it should be addressed to ensure proper emissions control and avoid potential complications.
7. How do I fix the P0442 code on a 2006 Infiniti G35?
Begin by tightening or replacing the gas cap. If the problem persists, inspect and replace any damaged EVAP hoses, purge valve, or the charcoal canister as needed.
8. How much does it cost to repair the P0442 code on an Infiniti G35?
Repair costs vary depending on the cause. Replacing a gas cap may cost $10-$50, while repairing EVAP system components can range from $100 to $600.
9. Can extreme weather cause the P0442 code on my 2006 Infiniti G35?
Yes, extreme temperatures can cause plastic or rubber EVAP components to crack, potentially leading to a small leak and triggering the P0442 code.
10. Will clearing the P0442 code solve the issue on my Infiniti G35?
Clearing the code will temporarily turn off the check engine light, but the underlying issue must be fixed to prevent the code from returning.
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