Fuel Tank Rollover Valve: What It Does and Signs It May Be Failing
Most drivers know their vehicle has a fuel tank, fuel pump, and fuel lines. But there is another small part that plays an important role in the fuel system: the rollover valve.
The rollover valve helps keep fuel from leaking out of the fuel tank if a vehicle tips over or rolls onto its side or roof.
It is also part of the system that controls fuel vapors. When this valve has a problem, it can cause fuel smells, check engine lights, or other fuel system issues.
At Jim Brangham Auto Repair, we help drivers in Cathedral City and the Coachella Valley find and repair fuel system problems.
What Does a Rollover Valve Do?
A rollover valve is a safety part connected to the fuel tank or fuel tank vent system. Its main job is to help stop liquid fuel from escaping through the fuel tank vent if the vehicle rolls over. During normal driving, the valve allows fuel vapors to move through the fuel vapor system. If the vehicle tips over, the valve is designed to close and help keep fuel inside the tank. This helps reduce the risk of fuel leaks during an accident.
What Happens When a Rollover Valve Goes Bad?
Like other parts of your vehicle, a rollover valve can wear out, stick, or become damaged.
When this happens, it may not work as it should.
A problem with the valve or the parts around it can cause:
- A fuel smell near your vehicle
- A Check Engine Light
- Problems with the fuel vapor system
- Trouble filling the gas tank
- Fuel vapor leaks
Not every one of these problems means the rollover valve is bad. Other parts of the fuel system can cause similar symptoms. That is why proper testing is important.
Can a Bad Rollover Valve Cause a Check Engine Light?
Yes, it can, depending on the vehicle and the type of problem. The rollover valve is often part of the vehicle's evaporative emissions system, also called the EVAP system. This system helps keep fuel vapors from escaping into the air. If there is a leak or another problem, the vehicle may turn on the Check Engine Light. A scan tool can help point us in the right direction, but more testing may be needed to find the exact cause.
Why Should You Have It Checked?
A fuel system problem should never be ignored. If you smell gasoline around your vehicle, have it checked as soon as possible. Fuel leaks and fuel vapors can create a fire risk. Do not smoke near the vehicle or park it near open flames. If you see liquid fuel leaking, stop driving and have the vehicle towed. Fixing a small problem early may help prevent more serious issues.
Rollover Valve and Fuel System Repair in Cathedral City
The rollover valve may be a small part, but it has an important job. It helps protect against fuel leaks if a vehicle rolls over and plays a role in the fuel vapor system.
At Jim Brangham Auto Repair, we can inspect your fuel system, check for EVAP problems, and find the cause of fuel smells or warning lights.
If you smell fuel or have a Check Engine Light, don't guess at the problem. Call (760) 321-7040 to schedule an inspection in Cathedral City, CA.
We proudly serve Cathedral City and the surrounding Coachella Valley with fuel system repair, diagnostics, and complete auto repair services.
Your fuel system has important safety parts. Make sure they are working as they should.
