Cracking the P0446 Case on Your 2023 Nissan Murano
A P0446 code has surfaced on your 2023 Nissan Murano, and the evidence points to an EVAP vent control circuit malfunction. As one of the final model years for the third-generation Murano (Z52 platform), your crossover's 3.5L VQ35DE V6 uses a well-established EVAP system. The PCM has flagged an electrical issue with the canister close valve circuit — not a vapor leak, but a circuit-level fault.
The good news for a 2023 model? Warranty coverage should handle most scenarios. Let's walk through the evidence to understand what's happening.
What You're Observing
- Check engine light illuminated with P0446 stored
- Possible difficulty fueling — nozzle clicks off prematurely
- EVAP system readiness monitor incomplete
- May appear with companion codes like P0440
The Suspect Lineup
- Canister Close Valve Electrical Failure (High Likelihood): Even on a relatively new vehicle, the canister close valve solenoid can fail. This is the most common P0446 cause across all Nissan models. On the Murano, it's located near the rear charcoal canister. Parts $55–$110, labor $120–$220 — but warranty should cover this.
- Wiring or Connector Defect (High Likelihood): On a 2023 model, a factory wiring issue or poorly seated connector at the canister close valve is a strong possibility. This is a no-cost warranty repair.
- Leak Detection Pump Circuit Issue (Medium Likelihood): Nissan's dedicated leak detection pump interfaces with the vent control circuit. A fault in this pump's wiring or internals can set P0446. Warranty-covered replacement.
- PCM Software Calibration (Medium Likelihood): Late-production Muranos may benefit from updated PCM software to fine-tune EVAP monitoring. A dealer reflash at no cost.
- Charcoal Canister Defect (Low Likelihood): Uncommon on a new vehicle unless fuel overfilling has occurred. Warranty-covered if applicable.
Recommended Approach
For a 2023 Murano, head directly to a Nissan dealer. Their CONSULT diagnostic system can perform bidirectional tests on the canister close valve, check the leak detection pump, and scan for TSBs specific to the Z52 Murano. An OBD-II scan confirming P0446 is helpful to mention to the service advisor.
Warranty Coverage
Your 2023 Murano is well within Nissan's 3-year/36,000-mile basic warranty, and the federal emissions warranty covers EVAP components for 8 years/80,000 miles. This repair should cost you nothing out of pocket.
Can I Drive With P0446?
Yes. P0446 has no effect on your Murano's engine performance, all-wheel drive system, or driving characteristics. It's purely an emissions circuit code. Drive normally to your dealer appointment.