What P0442 Means on Your 2022 Mitsubishi Outlander
A P0442 code on your 2022 Mitsubishi Outlander indicates the engine control module found a small leak in the evaporative emission control system. This sealed vapor network captures fuel vapors from the tank and routes them through a charcoal canister into the engine. A leak as small as 0.020 inches was detected during the system's self-test. The 2022 Outlander is an all-new design on the Nissan-Renault CMF-C/D platform, bringing updated EVAP components shared with the Nissan Rogue.
Investigating the Cause
The redesigned Outlander uses a 2.5L four-cylinder engine with CVT. Here are the ranked suspects:
- Gas cap seal issue (38%) — The gas cap seal wears from regular use and temperature cycling. After a couple years, micro-cracks or compression set allow vapor escape.
- Canister vent control valve failure (22%) — The vent control valve seals the EVAP system for leak monitoring. Mechanical or electrical failure prevents complete closure.
- EVAP line connection issue (18%) — The Outlander's three-row crossover layout means extended vapor routing. Connections can loosen from road vibration over time.
- Purge control solenoid malfunction (12%) — The purge control solenoid manages vapor flow from the canister to the engine. Internal seal wear prevents proper closure.
- Charcoal canister damage (10%) — Road debris impact or canister saturation from fuel overfilling.
PHEV Note
If your Outlander is the PHEV variant, the EVAP system is the same as the gasoline model, but monitors run less frequently due to intermittent engine operation. This can delay code setting and clearing.
Diagnostic Steps
- Gas cap inspection — Check the seal, clean the filler neck, and reinstall until it clicks.
- Smoke test — The most effective diagnostic for small EVAP leaks on the Outlander.
- MUT-III dealer diagnostics — Mitsubishi's dealer tool (MUT-III) can command EVAP components individually for targeted testing.
Repair Costs
- Gas cap: $15–$30
- Canister vent control valve: $140–$270 installed
- EVAP line repair: $90–$220
- Purge control solenoid: $130–$250 installed
- Charcoal canister: $280–$460 installed
- Smoke test: $80–$150
Warranty: Best in Class
Your 2022 Outlander benefits from Mitsubishi's industry-leading warranty: 5-year/60,000-mile basic and 10-year/100,000-mile powertrain coverage. Your basic warranty is likely still active. EVAP components are also covered by the federal emissions warranty (8 years/80,000 miles). Contact your Mitsubishi dealer — this repair should be fully covered.