P0442 on 2011-2017 Nissan JUKE: EVAP Small Leak Causes and Fixes

What's Unique About the 2011-2017 Nissan JUKE

For the Nissan JUKE, like many other Nissan models, the P0442 code is a very common issue that the manufacturer has addressed in multiple Technical Service Bulletins (TSBs). These bulletins often highlight the gas cap as a primary culprit but also provide detailed diagnostic flowcharts for other common failure points like the vent control valve and purge valve. Nissan explicitly states in TSB NTB13-097J that test-driving the vehicle to diagnose these DTCs is a waste of time and the specific diagnostic procedure must be followed for an effective repair.

Diagnostic Flowchart

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

Symptoms You May Notice

• Check Engine Light is on
• A faint fuel smell, especially when parked in an enclosed space like a garage.
• A "Loose Fuel Filler Cap" warning message on the dashboard.
• Hard starting or extended cranking immediately after refueling. This strongly suggests a faulty purge valve that is stuck open, allowing fuel vapors to flood the engine.

Most Likely Causes

1. Loose or Faulty Gas Cap 🔴 High Probability → Shop Fuel Tank Cap Nissan has issued multiple TSBs (including NTB09020F and NTB13-097J) that specifically mention the fuel filler cap as a primary cause for EVAP leak codes. The rubber O-ring on the cap can crack, wear out, or get dirty, preventing a proper seal. Owners on forums frequently report that using a cheaper aftermarket cap failed to solve the problem, while a genuine Nissan OEM cap fixed it immediately.
   How to confirm: Remove the gas cap and inspect the rubber seal for any cracks, stiffness, or debris. Ensure the cap is tightened until it clicks at least 1-3 times. Check the filler neck's metal sealing surface for rust or corrosion.
   Typical fix: Tighten or replace the fuel filler cap. Always opt for a genuine OEM Nissan cap (Part No. 17251-1LA0A or 17251-9CA0A) for best results, as aftermarket caps are notorious for causing sealing issues.
   Est. part cost: $15-$65
2. Faulty EVAP Vent Control Valve 🟡 Medium Probability → Shop Vapor Canister Vent Valve This valve, located near the charcoal canister at the rear of the vehicle, is exposed to road debris and moisture. It can get stuck open or fail to close completely due to dirt, corrosion, or even spider webs clogging the assembly, causing a small leak.
   How to confirm: A mechanic can command the valve to close with a scan tool and see if it holds a vacuum or pressure during a smoke test. It can also be removed and bench-tested by applying 12v power to see if the solenoid actuates and seals properly. If applying power does nothing, the internal coil is likely broken. 🎬 See this walkthrough on replacing the Juke's vent control valve.
   Typical fix: Replace the EVAP canister vent control valve. This is often sold as a solenoid assembly. The original part may have been superseded several times.
   Est. part cost: $60-$120
3. Faulty EVAP Canister Purge Valve/Solenoid 🟡 Medium Probability → Shop Vapor Canister This valve is located in the engine bay and controls the flow of fuel vapors from the canister to the engine. It can fail by getting stuck slightly open, creating a constant leak path. This is a common failure point across many Nissan models.
   How to confirm: With the engine off, the valve should be closed. Disconnect the valve and try to blow through it; if any air passes, the valve is leaking and needs to be replaced. A hard-starting condition after refueling 🎬 Watch: How to locate and replace the purge solenoid. is another strong indicator of a leaking purge valve.
   Typical fix: Replace the purge valve/solenoid.
   Est. part cost: $40-$90
4. Cracked or Disconnected EVAP Hoses ⚪ Low Probability Over time, the small rubber and plastic hoses in the EVAP system can become brittle from engine heat and age, leading to small cracks, especially at the fittings. Visually inspecting the hoses, particularly the small vacuum lines around the purge solenoid in the engine bay, may reveal visible cracks when bent or squeezed.
   How to confirm: A visual inspection may reveal obvious cracks or disconnected lines. However, small leaks often require a smoke test, where a mechanic fills the EVAP system with a visible vapor to pinpoint the exact location of the leak.
   Typical fix: Replace the cracked hose section or reconnect the loose fitting. Some owners have success trimming the end of a cracked hose and re-clamping it if there is enough slack.
   Est. part cost: $10-$50

Rare But Worth Checking

• Cracked Charcoal Canister: → Shop Vapor Canister The plastic housing of the canister itself can develop hairline cracks from age or impact, causing a leak. This is usually found with a smoke test and is less common than valve or hose failures.
• Corroded Fuel Filler Neck: → Shop Fuel Filler Neck In areas with high humidity or road salt, the metal surface where the gas cap seals can rust, creating an uneven surface that prevents a good seal. One owner of a similar vehicle found their P0442 was caused by a completely rusted-out filler neck. Inspect this area closely when checking the gas cap and clean any light corrosion with a wire brush.
• Spider Webs/Insect Nests in Vent Valve Filter: A known issue on some Nissan and other brand vehicles is that spiders or other insects build nests in the EVAP vent filter box. This can cause a blockage that may lead to various EVAP codes, including P0442.

Diagnosis Steps

1. Read the code with an OBD-II scanner to confirm P0442 is present. Note any other codes.
2. Inspect the gas cap. Remove it, check the seal for damage, and inspect the filler neck sealing surface for rust. Reinstall the cap, ensuring it clicks multiple times.
3. Clear the code. Drive the vehicle for a few days to see if the light returns. Note that Nissan states a test drive is not an effective part of the diagnostic procedure for this code; the system's self-test runs under specific conditions.
4. If the light returns, consider replacing the gas cap with a genuine OEM part as a low-cost, high-probability fix.
5. If the code persists, perform a thorough visual inspection of all accessible EVAP hoses in the engine bay, especially the small vacuum lines connected to the purge valve. Squeeze or bend them to reveal hidden cracks.
6. Test the purge valve in the engine bay. With the engine off, remove the valve and try to blow through it. If air passes, it has failed and needs replacement.
7. If the cause is still not found, a professional smoke test is the most effective method to find the source of the small leak. This test pressurizes the system with smoke, which will visibly escape from any crack or leak point.

Parts You'll Likely Need

• Fuel Filler Cap (OEM #17251-1LA0A (supersedes 17251-9CA0A)) — This is the most frequent cause of P0442, as confirmed by Nissan TSBs and countless owner experiences. The seal wears out, and aftermarket versions often don't seal correctly.
  Trusted brands: Nissan (OEM)
  OEM price range: $35-$65
  Aftermarket price range: $15-$30
• EVAP Canister Vent Control Valve (OEM #14935-JF02C (supersedes 14935-JF00A, 14935-JF00B, 14935-JF00C, etc.)) — A common failure point that gets stuck open due to dirt, internal corrosion, or electrical failure, creating a leak. Its location at the rear of the car exposes it to the elements.
  Trusted brands: Nissan (OEM), Bosch, Dorman
  OEM price range: $60-$90
  Aftermarket price range: $40-$70
• EVAP Canister Purge Valve (OEM #14930-EN20A) — This valve in the engine bay can leak internally, causing a constant small leak path and often leading to hard starts after refueling.
  Trusted brands: Nissan (OEM), Hitachi, Delphi
  OEM price range: $70-$110
  Aftermarket price range: $40-$80

Related Codes That Often Appear With This One

• P0456 — This code indicates a 'Very Small Leak,' and often the same faulty component can trigger either P0442 or P0456 depending on the test conditions and leak severity. Nissan groups these codes together in its TSBs.
• P0455 — This code indicates a 'Large Leak.' If a component like a vent valve fails intermittently, it might sometimes cause a small leak (P0442) and other times a large one (P0455). Nissan groups these codes together in its TSBs.

Technical Service Bulletins (TSBs) & Recalls

• NTB13-097J: EVAP LEAK DTC P0442, P0455, P0456 INFORMATION
• NTB09020F: SERVICE INFORMATION (regarding loose fuel fill cap for P0442, P0455, P0456)

Platform-Specific Known Issues

• Nissan has issued multiple Technical Service Bulletins (TSBs) regarding EVAP leak codes P0442, P0455, and P0456. TSB NTB09020F specifically points to a loose fuel fill cap as a potential cause on 2011 models.
• TSB NTB13-097J (and its many revisions) provides a detailed diagnostic flowchart for these codes on 2012 and newer models, confirming they are a known, widespread issue for the manufacturer. The bulletin explicitly states that test driving is not a valid diagnostic step and can waste time.

Mechanic-Grade Diagnostic Values

• EVAP Canister Purge Valve / Vent Control Valve Solenoid Resistance — expected: Generally between 15 and 30 Ohms, but can range up to 50 Ohms on some models.. Failure: A reading far outside the expected range, or an open circuit (infinite resistance), indicates a failed internal coil.
• EVAP Vent Control Valve Power Supply Voltage — expected: Approximately 12V (battery voltage) on one pin of the connector with the ignition key in the ON position.. Failure: No voltage at the power pin suggests a wiring issue, blown fuse, or problem with the IPDM (Intelligent Power Distribution Module).
• Fuel Tank Pressure (FTP) Sensor Voltage — expected: Typically between 1.0V and 4.0V during normal operation.. Failure: Voltage that is stuck high or low, or does not change when the system is sealed and vacuum is applied, can indicate a faulty sensor.

Scan Tool Commands That Help

• Nissan CONSULT-III plus: EVAP System Test (Active Test) — This is the Nissan factory-level procedure to automatically command valves, seal the system, and check for pressure changes to diagnose leaks without manual testing.
• Professional Bidirectional Scan Tool: Vent Valve Control & Purge Valve Control — Used to manually test components. A technician can command the vent valve closed to seal the system, then command the purge valve open to apply engine vacuum, while watching the Fuel Tank Pressure (FTP) sensor data to see if the system holds vacuum.

Wiring & Ground Locations

• EVAP Canister Vent Control Valve Connector — At the EVAP canister vent control valve, located under the right rear of the vehicle, on or near the charcoal canister.. This connector provides power and the ECM-switched ground to operate the valve. Checking for battery voltage here is a primary step to rule out a wiring fault before replacing the valve.
• EVAP Canister Purge Volume Control Solenoid Valve — Located in the engine compartment. On 1.6L models, it is on the inlet manifold.. This is a common failure point. Verifying the connector is secure and the wiring is intact is crucial. A poor connection can prevent the valve from operating correctly.
• Main Engine/Body Grounds — A main ground strap runs from the top of the engine to the body behind the headlight. Other key grounds are located on the engine block, at the back of the cylinder heads, and on the chassis near the battery.. A poor or corroded ground connection for the ECM or related components can cause erratic sensor readings and incorrect valve operation, potentially mimicking an EVAP leak.

OEM Part Supersession History

• 14935-JF00A, 14935-JF00B, 14935-JF00C, 14935-JF00D, 14935-JF00E → 14935-JF02C — Part has been revised and updated by the manufacturer over time to improve reliability.
  Heads up: The latest part number is the recommended replacement for all previous versions.

Model Year Variations Within This Range

• 2011-2014 vs 2015-2017: The EVAP Canister Purge Valve located in the engine bay may have a different part number for early models versus models from the 2015 facelift onward. It is critical to verify the correct part for your specific model year when ordering. The base engine and power output remained the same.