Understanding P0442 on Your 2023 Nissan Murano
A P0442 code on your 2023 Nissan Murano means the engine control module has detected a small leak in the evaporative emission control system. This system captures fuel vapors and recycles them through the engine. A leak approximately 0.020 inches in diameter was found during the system's self-test.
The 2023 Murano is the final model year for this generation of Nissan's midsize crossover, powered by the 3.5L V6 with the Xtronic CVT. The mature EVAP system design uses the PVCV, canister vent control valve, and Nissan's dedicated leak detection pump.
Probable Causes
- Gas Cap Not Properly Sealed — A loose or cross-threaded gas cap is the simplest trigger. After a couple years of use, minor O-ring wear can also contribute. Check this first.
- PVCV (Purge Volume Control Valve) Issue — V6 engine heat can begin to stress the PVCV even after just a couple years. A valve that does not seal properly allows vapor escape.
- Canister Vent Control Valve Problem — Moisture and road debris can affect the vent valve's sealing ability.
- Software Calibration Sensitivity — As the final model year, calibration refinements may address borderline P0442 triggers.
- Vapor Line Connection Looseness — Normal vibration can work fittings slightly loose over time.
Warranty-First Approach
- Check the gas cap — Remove, inspect, and reinstall firmly. Free and may resolve the code.
- Visit the Nissan dealer — Your 2023 Murano should still be within the 3-year/36,000-mile basic warranty. EVAP components are covered for 8 years or 80,000 miles under the federal emissions warranty.
- Ask about TSBs — Request that the dealer check for technical service bulletins.
Costs if Out of Warranty
Gas cap $10–$20, PVCV $140–$280, vent valve $110–$250, leak detection pump $200–$400. Check warranty status first — most repairs should be covered.