P0455 on 2007-2014 Nissan Pathfinder: EVAP Gross Leak Causes and Fixes

What's Unique About the 2007-2014 Nissan PATHFINDER

The 2007-2014 Pathfinder range spans two distinct generations: the truck-based R51 (2007-2012) and the unibody R52 (2013-2014). While the cause can be a simple loose gas cap on either, Nissans from this era are known for EVAP vent control valve failures. These valves, located near the charcoal canister at the rear of the vehicle, can get stuck open due to dirt, debris, or internal solenoid failure, causing a large leak that the system detects. Nissan has issued multiple Technical Service Bulletins (TSBs) acknowledging that a loose fuel filler cap is a primary cause for this code across its lineup and instructing technicians on a specific diagnostic flow.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Generation note: This range covers the end of the 3rd generation (R51, 2007-2012) and the start of the 4th generation (R52, 2013-2014). While the fundamental causes are similar, the exact location and part numbers for EVAP components like the vent valve and charcoal canister may differ. The R51 shares its platform with the Frontier and Xterra, which also commonly experience P0455 due to the vent valve. The R52 shares its platform with the Infiniti JX35/QX60 and Murano, which also see this code frequently.

Symptoms You May Notice

• Check Engine Light is on.
• A noticeable smell of fuel, especially around the rear of the vehicle.
• No noticeable change in engine performance or drivability.
• Difficulty starting the engine immediately after refueling.

Most Likely Causes

1. Loose, Faulty, or Incorrect Fuel Cap 🔴 High Probability → Shop Fuel Tank Cap This is the most common cause for any vehicle, and Nissan specifically highlights it in TSBs like NTB13-097J. The cap's seal can wear out, or it may not have been tightened correctly. Many owners on forums report that only an OEM Nissan gas cap will solve the problem, with aftermarket caps often failing to seal properly.
   How to confirm: Inspect the gas cap for cracks or damage to the rubber seal. Ensure it is tightened until it clicks multiple times. If the code returns, replacing the cap with an OEM part is the recommended next step. A forum user on NPORA forums described replacing an aftermarket cap with an OEM one to finally solve the issue.
   Typical fix: Tighten or replace the fuel filler cap with a genuine OEM part.
   Est. part cost: $25-$40
2. Failed EVAP Vent Control Valve (Solenoid) 🔴 High Probability → Shop Vapor Canister Vent Valve This is a well-documented failure point on many Nissan models, including the Pathfinder and its platform mates like the Frontier and Xterra. The valve is located under the vehicle near the charcoal canister, where it is exposed to road grime and moisture, causing it to stick open or the internal solenoid to fail.
   How to confirm: The valve is normally open and should click shut and block airflow when 12V is applied. A smoke test is the most definitive method; if smoke is fed into the EVAP system and exits from the vent valve's filter without it being commanded closed, the valve is stuck open. In a detailed YouTube video, a user confirms the failure by applying power and seeing that the valve still allows smoke to pass through.
   Typical fix: Replace the EVAP vent control valve. It often twists into the charcoal canister and is secured by a lock tab.
   Est. part cost: $70-$120
3. Cracked or Disconnected EVAP Hoses 🟡 Medium Probability Rubber hoses become brittle over time due to heat cycles and age, leading to cracks. A large crack or a completely disconnected hose can easily cause a P0455 code.
   How to confirm: Visually inspect all accessible EVAP lines from the engine bay to the charcoal canister. Pay close attention to connection points. A smoke test is the most effective way to find a leak that isn't obvious, as smoke will visibly escape from any cracks or loose connections.
   Typical fix: Replace the cracked section of hose or re-secure a disconnected line.
   Est. part cost: $10-$50
4. Failed EVAP Canister Purge Volume Control Valve (Solenoid) ⚪ Low Probability → Shop Vapor Canister This valve, located in the engine bay, can fail and stick open, creating a constant vacuum leak from the EVAP system into the engine. While less common than the rear vent valve, it is a known failure point.
   How to confirm: This valve is normally closed when the engine is off. Disconnect the valve and try to blow through it. If air passes, the valve is stuck open and has failed. You can also test it with a hand-held vacuum pump.
   Typical fix: Replace the purge valve.
   Est. part cost: $40-$90

Rare But Worth Checking

• Cracked Charcoal Canister: → Shop Vapor Canister The plastic housing of the canister itself can develop a crack from road debris impact or age, creating a large leak. This is usually found during a smoke test when smoke billows from the canister body itself.
• Leaking Fuel Tank Filler Neck: → Shop Fuel Tank The metal tube leading to the gas tank can rust and perforate, especially in regions that use road salt. This creates a large, permanent leak in the system that bypasses the gas cap seal.
• Faulty Fuel Tank Pressure Sensor: → Shop Fuel Tank A faulty sensor could incorrectly report a pressure drop to the ECM, even if no leak exists. This is less common, but possible if all other components test good.

Diagnosis Steps

1. Check the gas cap. Remove it, inspect the seal for damage, and reinstall it, ensuring it clicks at least once. Clear the code. If it returns, consider replacing it with an OEM cap before proceeding.
2. If the code returns, perform a thorough visual inspection of all accessible EVAP hoses in the engine bay and under the vehicle near the fuel tank. Look for obvious cracks, damage, or disconnected lines.
3. Locate the EVAP vent control valve near the charcoal canister at the rear of the vehicle. On the R51, it's mounted to the canister under the vehicle. On the R52, it's on the driver's side between the spare tire and rear wheel. Inspect it and its wiring for corrosion or damage.
4. The most definitive diagnostic step is to perform a smoke test. A smoke machine injects low-pressure smoke into the EVAP service port. The leak will be wherever smoke is seen escaping. This will quickly identify a bad valve, cracked hose, or faulty canister.
5. If a smoke test is not available, you can test the vent and purge valves individually. The vent valve (rear) is normally open and should close when 12V is applied. The purge valve (engine bay) is normally closed and should not allow air to pass when de-energized.

Parts You'll Likely Need

• Fuel Filler Cap (OEM #17251-79917 (for R51), 17251-3JA0A (for R52)) — This is the most frequent cause of P0455. The seal degrades over time or the cap is not tightened properly. Using an OEM cap is highly recommended for proper fit, as many owners report issues with aftermarket caps.
  Trusted brands: Nissan (OEM)
  OEM price range: $25-$40
  Aftermarket price range: $15-$25
• EVAP Vent Control Valve (OEM #14935-JF00A (or superseded by 14935-JF00B, 14935-JF02C)) — A very common failure point on Nissans of this era. It gets stuck open, causing a large leak. This part has been updated by Nissan multiple times, indicating a known design issue.
  Trusted brands: Nissan (OEM), Dorman (911-504), Hitachi
  OEM price range: $90-$120
  Aftermarket price range: $50-$90
• EVAP Canister Purge Valve (OEM #14930-EN20A) — Less common than the vent valve, but this part can stick open, causing a leak. It is located in the engine bay and is relatively easy to replace.
  Trusted brands: Nissan (OEM), Bosch, Delphi
  OEM price range: $60-$90
  Aftermarket price range: $30-$50

Related Codes That Often Appear With This One

• P0442 — Indicates a small EVAP leak. These codes often appear together if the system has multiple leaks or if the size of the leak is borderline between 'large' and 'small'.
• P0456 — Indicates a very small EVAP leak. A failing gas cap seal or vent valve O-ring might first trigger a P0456 before worsening and triggering a P0455.

Technical Service Bulletins (TSBs) & Recalls

• NTB13-097J: General information for dealers on d

Platform-Specific Known Issues

• The R51 Pathfinder (2007-2012) is particularly known for issues with the EVAP vent control valve and canister clogging, sometimes leading to difficulty refueling. The valve is located on the canister, which is under the vehicle and exposed to the elements.
• For the R52 Pathfinder (2013-2014), while P0455 is still common, the EVAP canister assembly is located on the driver's side between the spare tire and the rear wheel, which can offer slightly more protection but is still susceptible to failure.
• Some owners on NPORA forums have documented their entire diagnostic journey, starting with an aftermarket gas cap that failed, then an OEM cap, before finally tracing the P0455 to the vent control valve solenoid.

Mechanic-Grade Diagnostic Values

• EVAP Canister Vent Control Valve Solenoid Resistance — expected: 48 - 65 Ohms. Failure: A reading outside this range suggests a faulty solenoid coil.
• EVAP Canister Purge Volume Control Solenoid Resistance — expected: 30 - 38 Ohms. Failure: An open circuit (infinite resistance) or a reading outside this range indicates a bad valve.
• Fuel Tank Pressure (FTP) Sensor Signal Voltage (Key On, Engine Off, Gas Cap Open) — expected: Approximately 2.5 Volts. Failure: A reading of 5V may indicate a bad sensor, while a reading near 0V could point to a wiring issue. Applying a slight vacuum should cause the voltage to drop.

Scan Tool Commands That Help

• Nissan CONSULT or equivalent professional scanner: Actuator Test: Vent Control Valve — This command allows a technician to manually command the vent valve closed. It is used during a smoke test to seal the system or to audibly check if the valve's solenoid is clicking, confirming it is receiving the signal to activate.
• Nissan CONSULT or equivalent professional scanner: EVAP System Leak Check — This is an automated test sequence initiated by the scan tool that closes the vent valve, commands the purge valve, and monitors the fuel tank pressure sensor to verify the system can hold a vacuum. It's a primary diagnostic step outlined in Nissan's service information.

Wiring & Ground Locations

• EVAP Canister Vent Control Valve — R51 (2007-2012): Mounted to the charcoal canister, located behind the driver's side rear tire. R52 (2013-2014): Located under the spare tire housing.. This is the location of the most common electrical component to fail and cause P0455. Knowing its location is critical for visual inspection, testing, and replacement.
• EVAP Canister Purge Volume Control Solenoid Valve — R51 (2007-2012): In the engine bay. R52 (2013-2014): On the right rear of the engine.. This is the secondary solenoid that can cause P0455 if it sticks open. Its location in the engine bay makes it easier to access for testing than the rear vent valve.
• EVAP Control System Pressure Sensor — Located under the left rear of the vehicle for the R51 (2012 model year).. This sensor is what the ECM uses to detect the pressure drop that triggers the P0455 code. A faulty sensor or its wiring can mimic a leak.
• Ground E9 — Located on the left side of the engine compartment for the R51 (2012 model year).. This is a potential ground point for engine compartment components of the EVAP system. A corroded or loose ground can cause erratic behavior in sensors and solenoids.

Real Owner Repair Stories

• YouTube user 'Gears & Queers' (2007 Infiniti G35 (shares platform components with Pathfinder)) — Intermittent Check Engine Light for P0455, a gross emissions leak.
  ❌ Tried (didn't work) Initial internet research pointed to the gas cap, but the owner focused on the more likely vent valve.
  ✅ What actually fixed it The problem was resolved by replacing the EVAP canister vent valve located at the rear of the car. The owner noted that the part number had been superseded multiple times by Nissan/Infiniti, indicating a known issue with the original design. The new part was 14935-JF01C.
• YouTube user 'Mcgurr Entertainment' (Nissan Frontier (shares R51 platform with Pathfinder)) — Check Engine Light with code P0455.
  ❌ Tried (didn't work) Clearing the code; it returned., Inspecting the gas cap, which appeared to be in good condition visually.
  ✅ What actually fixed it The old EVAP vent control valve was tested by applying 12V power and it failed to click or close (it remained open, allowing smoke to pass through). A new valve was tested and shown to click and close properly. Replacing the faulty EVAP vent control valve was the definitive fix.

OEM Part Supersession History

• 14935-JF00A → 14935-JF00B, 14935-JF00C, 14935-JF00D, 14935-JF00E, 14935-JF01B, 14935-JF01C, and finally 14935-JF02C — The EVAP vent control valve is a known high-failure part across many Nissan models. The multiple supersessions indicate repeated design revisions by Nissan to improve durability and prevent the valve from sticking open due to contamination or internal failure.
  Heads up: While all parts in the chain are meant to be replacements, using the latest available part number (e.g., 14935-JF02C) is highly recommended to benefit from the most recent design improvements.

Model Year Variations Within This Range

• 2007-2012 (R51 Generation): The EVAP canister and vent valve assembly are located behind the driver's side rear wheel, mounted under the vehicle. This exposed location makes it highly susceptible to road debris, water, and salt, contributing to a higher failure rate of the vent valve.
• 2013-2014 (R52 Generation): The EVAP canister and vent valve assembly are located under the spare tire housing. While still under the vehicle, this location is slightly more protected from direct wheel spray compared to the R51, though failures are still common. The purge valve is located on the right rear of the engine.