What Triggered P0442 on Your 2024 Infiniti QX60?
Code P0442 on your 2024 Infiniti QX60 signals that the engine control module found a small leak in the evaporative emission control system during its self-diagnostic cycle. This sealed vapor recovery system prevents fuel vapors from escaping the fuel tank by routing them through a charcoal canister and back into the engine. A leak as small as 0.020 inches was detected — imperceptible visually, but enough for the system's precise monitoring.
The Investigation
On a low-mileage 2024 QX60 built on the Pathfinder platform, the cause profile leans toward manufacturing factors:
- Gas cap not fully engaged (33%) — A cap that wasn't clicked into its final position after fueling, or one with debris on the seal surface. Even on new vehicles, this is the most common trigger.
- Canister vent control valve defect (27%) — A factory-installed vent control valve with borderline seal performance. Nissan/Infiniti's valve may pass initial testing but fail the system's sensitive overnight leak check.
- Assembly connection issue (18%) — A vapor line fitting or clamp not fully seated during production. The QX60's three-row layout means extensive EVAP routing with many connection points.
- Purge Volume Control Valve (PVCV) issue (12%) — The PVCV controls vapor flow from the canister to the 3.5L V6's intake. An internal seat defect creates a slow bypass.
- Leak detection pump variance (10%) — The Nissan-specific leak detection pump may have a calibration issue that causes false positive readings.
What To Do
- Check the gas cap — Remove, inspect, and reinstall firmly. Drive for 2-3 days to see if the code clears.
- Visit your Infiniti dealer — This is a warranty repair. The dealer will use CONSULT diagnostics to test each EVAP component and perform a smoke test if needed.
- Don't overfill — Stop fueling when the pump clicks off to protect the charcoal canister from liquid fuel contamination.
Cost Reference (Warranty-Covered)
- Gas cap: $15–$35
- Canister vent control valve: $170–$320 installed
- EVAP line repair: $90–$230
- PVCV: $160–$300 installed
- Leak detection pump: $210–$420 installed
Warranty Coverage
Your 2024 QX60 is fully covered by Infiniti's 4-year/60,000-mile basic warranty and 6-year/70,000-mile powertrain warranty. EVAP components also fall under the federal emissions warranty (8 years/80,000 miles). This repair will be handled at no charge. Contact your Infiniti dealer to schedule service.