A damaged valve that allows air into a vehicle's fuel tank can cause the fuel tank to expand and contact nearby hot exhaust components, which can melt the fuel tank.
November 20, 2025
high
technical
Describes a mechanical failure mode where air ingress leads to tank expansion and contact with exhaust heat.
A melted fuel tank can leak fuel, increasing the risk of a vehicle fire.
November 20, 2025
high
safety
Consequence of fuel tank structural failure due to melting or breach.
Symptoms that can indicate a fuel tank or fuel-system fault include audible popping sounds from the fuel tank area, illumination of the dashboard check engine light, and the vehicle running rough.
November 20, 2025
high
diagnostic
Common observable signs drivers may notice when there is a fuel-tank or related fuel-system issue.