P0442 2008 Nissan Maxima 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 2008 Nissan Maxima 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 2008 Nissan Maxima 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 2008 Nissan Maxima?
- 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 2008 Nissan Maxima?
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 a factory Nissan service bulletin to help diagnose the P0442 code:
Nissan Factory Service Bulletin OBDII Code P0442
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0442 2008 Nissan Maxima 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 2008 Nissan Maxima code?
Need more information on how to fix the P0442 2008 Nissan Maxima code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0442 2008 Nissan Maxima code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0442 2008 Nissan Maxima Code
What does the OBDII code P0442 mean on a 2008 Nissan Maxima?
P0442 indicates a small leak in the EVAP (Evaporative Emission Control) system, which prevents fuel vapors from escaping into the atmosphere.
What are the common symptoms of a P0442 code on a 2008 Nissan Maxima?
Common symptoms include an illuminated Check Engine Light, a faint smell of fuel, and possible minor drops in fuel efficiency.
What causes the P0442 code to appear on a 2008 Nissan Maxima?
Potential causes include a loose or damaged gas cap, a cracked or disconnected EVAP hose, a faulty purge valve, or a leaking charcoal canister.
Can a loose gas cap trigger the P0442 code on my Nissan Maxima?
Yes, a loose, damaged, or improperly sealed gas cap is one of the most common causes of the P0442 code.
How do I fix the P0442 code on a 2008 Nissan Maxima?
Start by tightening or replacing the gas cap. If the issue persists, inspect EVAP hoses and components for damage or leaks, and repair or replace them as necessary.
Is it safe to drive with a P0442 code on a 2008 Nissan Maxima?
Yes, it’s generally safe to drive, but the issue should be addressed promptly to avoid potential emissions problems and reduced fuel efficiency.
How can I diagnose the P0442 code on a 2008 Nissan Maxima?
Use a diagnostic scan tool to confirm the code, inspect the gas cap and EVAP system components for leaks or damage, and perform a smoke test if necessary to locate small leaks.
Can extreme weather cause the P0442 code on a 2008 Nissan Maxima?
Yes, extreme heat or cold can cause components in the EVAP system, such as hoses or seals, to expand or contract, potentially leading to leaks.
Will replacing the gas cap always fix the P0442 code on a 2008 Nissan Maxima?
Not always. While a faulty gas cap is a common cause, other EVAP system components like hoses, valves, or the charcoal canister could also be responsible.
How much does it cost to repair a P0442 code on a 2008 Nissan Maxima?
The cost varies depending on the cause. Replacing a gas cap may cost $20-$50, while repairs to EVAP system components can range from $100 to $500 or more.
Discuss the causes and fixes for P0442 2008 Nissan Maxima OBDII Code
Code P0442 2008 Nissan Maxima comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
