What The Sources Say About It
- Honda says a filler neck leak on 2016 Pilot and 2017 Ridgeline is fixed by replacing the mis fuel inhibitor and main flap, not the whole fill pipe. (source)
- Acura found a stuck open fuel filler main flap could set P0455 on 2021 to 2022 TLX. (source)
- GM says do not keep pumping after the nozzle clicks off. More than three extra clicks is too much and can push liquid fuel into the EVAP system. (source)
- VW found fuel can collect in the EVAP system and cause early nozzle shut off, spillback and a fuel odor (recall 24V 110). (source)
Codes That Point Here
What It Costs
Published estimates put a filler neck at $492 at YourMechanic. See every price row. For a real example of pricing the test before the part, see a smoke test we ran on a 2005 E55.
By Anthony Limpert, co-founder of Supercanic in San Jacinto, California, a shop with ASE certified mechanics. Updated November 12, 2026.
Author Source EEAT Authors · Anthony's Author Page
Sources For This Page
- Tech Line ATS 170206, EVAP leak from the filler neck (February 2017), American Honda Motor Co., read 2026-11-12
- Service Bulletin 21-007 Version 2, MIL Is ON with DTC P0455, TLX (September 2, 2022), American Honda Motor Co. (Acura), read 2026-11-12
- PI PIP4891G, MIL DTC P0497 on Volt, Ampera, ELR (August 2015), General Motors, read 2026-11-12
- Part 573 Safety Recall Report 24V-110 (June 10, 2024), Volkswagen Group of America (NHTSA), read 2026-11-12
- Fuel Filler Neck Replacement, YourMechanic, read 2026-11-12