Cracking the P0440 Case on Your 2022 Jeep Compass
A P0440 code on your 2022 Jeep Compass points to an EVAP system malfunction. The redesigned second-generation Compass (MP/552 platform) features a 2.0L Tigershark four-cylinder (200 hp) paired with an 8-speed automatic and available Active Drive 4WD. With a few years of service, certain EVAP components may need attention. Let's investigate the usual suspects.
Symptoms
- Check engine light on
- Faint gasoline smell
- Slight MPG decrease
- Fueling difficulties at the pump
- Emissions test failure
Your Compass drives normally. Engine, 8-speed, and 4WD are unaffected.
Most Likely Causes
- Gas Cap — Worn seal or loose. Check first. Estimated repair: $5–$25.
- Purge Solenoid Valve — Controls vapor flow to the 2.0L Tigershark intake. Can stick or fail. Estimated repair: $75–$200.
- Vent Valve/Solenoid — Manages EVAP system airflow near the charcoal canister. Estimated repair: $85–$220.
- Vapor Line Leak — Small cracks from heat cycling. Estimated repair: $45–$140.
- Fuel Tank Pressure Sensor — Inaccurate readings. Estimated repair: $85–$230.
Diagnostic Steps
- Replace gas cap, clear code, drive 50+ miles
- Scan for companion EVAP codes
- Test purge and vent valves with scan tool
- Perform EVAP smoke test
- Check for Jeep TSBs on the 2022 Compass
Repair Costs
- Gas cap: $5–$25
- Purge solenoid: $75–$200
- Vent valve: $85–$220
- Vapor line: $45–$140
- FTP sensor: $85–$230
- Diagnostic: $80–$150
Warranty: Jeep's 3-year/36,000-mile basic warranty has likely expired. Check your purchase date and mileage.
Can I Drive With P0440?
Yes. No impact on drivability or safety.
DIY Feasibility
Gas cap is trivial. The purge solenoid is moderately accessible on the 2.0L Tigershark in the compact engine bay. The vent valve underneath requires working under the vehicle.