P0456 on Your 2024 Altima: Warranty Covers This
Your 2024 Altima has triggered P0456—a very small EVAP leak at 0.020 inches. The midsize sedan's 2.5L four-cylinder uses Nissan's unique EVAP system that includes a dedicated leak detection pump—an extra component other manufacturers don't use. Under warranty, this is a zero-cost repair regardless of the cause.
Symptoms
- Check engine light on
- P0456 stored in ECM
- No drivability issues
- CVT and AWD (if equipped) normal
Causes
- Gas Cap Seal (High Likelihood): Nissan uses traditional threaded caps. Loose or debris. $0 warranty.
- EVAP Leak Detection Pump (High Likelihood): Nissan's unique component that actively tests for leaks. Failure is a known Nissan issue. $0 warranty.
- Purge Volume Control Valve (Medium Likelihood): Nissan's name for the purge solenoid. $0 warranty.
- Canister Close Valve (Medium Likelihood): Nissan's vent control valve. $0 warranty.
- Software Calibration (Low Likelihood): ECM sensitivity update. $0 warranty.
What to Do
- Reseat gas cap
- Schedule warranty appointment at your Nissan dealer
- Dealer diagnoses with CONSULT diagnostic system
- Repair at no cost under warranty
Cost
- Under warranty: $0
- Bumper-to-bumper through 2027 (3yr/36k)
- Federal emissions through 2032 (8yr/80k)
Can I Drive?
Yes. P0456 has zero impact on the Altima's performance, CVT, AWD, or any feature.
Warranty
Nissan's 3yr/36k through 2027. Federal emissions 8yr/80k through 2032. Let the dealer handle it at no cost.