Solving P0455 on Your 2024 Nissan Titan
A P0455 on your 2024 Titan means the ECM detected a large EVAP leak. Your Titan with the 5.6L Endurance V8—in its final production year—is fully under warranty. Check the gas cap first.
Symptoms
- Check engine light with P0455
- Possible fuel odor
- Gas cap not clicking
- EVAP monitor incomplete
Most Likely Causes
- Gas Cap (Very High Likelihood): Loose or not seated. Tighten until it clicks.
- Software Calibration (Medium Likelihood): ECM may need a Nissan TSB update.
- Vent Control Valve (Medium Likelihood): Factory defect. Warranty replacement.
- Purge Volume Control Valve (Low Likelihood): PVCV stuck open. Warranty-covered.
- EVAP Line Connection (Low Likelihood): Assembly issue. Warranty-covered.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 persists, visit a Nissan dealer for free diagnostics and repair.
Warranty Coverage
Your 2024 Titan is covered by Nissan's 3-year/36,000-mile warranty through 2027, 5-year/100,000-mile powertrain warranty, and federal emissions warranty (8yr/80k) through 2032.
Safe to Drive?
Yes. P0455 doesn't affect the Titan's 5.6L V8, 9-speed, 4x4, or towing.