P0446 Nissan Code - Evaporative System Canister Vent Control Valve Circuit
Quick Answer
The Evaporative System (EVAP) canister vent control valve is located on the EVAP canister and is used to seal the canister vent. Common causes include Missing 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
- P0446 Nissan indicates Evaporative System Canister Vent Control Valve Circuit.
- Common causes
- Common causes include Missing 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 P0446 Nissan Description
This solenoid valve responds to signals from the Engine Control Module (ECM). When the ECM sends an ON signal, the coil in the solenoid valve is energized. A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative emission control system components.
This solenoid valve is used only for diagnosis, and usually remains opened.
What are the Possible Causes of the DTC P0446 Nissan?
- Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Vent control valve harness is open or shorted
- Vent control valve circuit poor electrical connection
- Faulty vent control valve
How to Fix the DTC P0446 Nissan?
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
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0446 Nissan 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 P0446 Nissan code?
Need more information on how to fix the P0446 Nissan code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0446 Nissan code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0446 Nissan Code
1. What does the OBDII code P0446 mean on a Nissan?
P0446 indicates a malfunction in the evaporative emission control system (EVAP), specifically related to the canister vent control valve circuit.
2. What are the common symptoms of the P0446 code on a Nissan?
Symptoms may include an illuminated check engine light, slight decrease in fuel efficiency, and potential difficulty filling the fuel tank due to venting issues.
3. What causes the P0446 code to appear on a Nissan?
Common causes include a faulty canister vent control valve, damaged or disconnected EVAP hoses, clogged charcoal canister, or wiring/electrical issues in the valve circuit.
4. Is it safe to drive a Nissan with the P0446 code?
Yes, it is generally safe to drive with this code, but it may lead to increased emissions and could cause issues during emissions testing.
5. How do I diagnose the P0446 code on a Nissan?
Diagnosis typically involves inspecting the canister vent control valve, checking EVAP hoses and connections for leaks or damage, and testing the valve's electrical circuit for proper operation.
6. Can a loose gas cap trigger the P0446 code on a Nissan?
A loose or damaged gas cap is less likely to cause P0446 but can trigger similar EVAP-related codes. Always check the gas cap as part of troubleshooting.
7. How do I fix the P0446 code on a Nissan?
Repairs may involve replacing a faulty canister vent control valve, repairing damaged EVAP hoses, cleaning or replacing the charcoal canister, or addressing wiring issues in the valve circuit.
8. How much does it cost to fix the P0446 code on a Nissan?
Repair costs can range from $100 to $300, depending on whether the canister vent control valve, hoses, or other components need replacement.
9. Can I clear the P0446 code without fixing the problem?
Clearing the code without fixing the issue may temporarily turn off the check engine light, but the code will likely return until the underlying problem is resolved.
10. What tools are needed to troubleshoot the P0446 code on a Nissan?
Common tools include an OBDII scanner, multimeter for electrical testing, and basic hand tools for inspecting and replacing EVAP system components.
Discuss the causes and fixes for P0446 Nissan OBDII Code
Code P0446 Nissan 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.
