What is the replacement interval for the canister purge valve?
2 Answers
The canister purge valve does not have a fixed replacement interval. The function and working principle of the canister purge valve are as follows: Function of the canister purge valve: The canister purge valve is a device installed in cars or motorcycles to reduce air pollution caused by fuel vapor emissions and simultaneously improve fuel efficiency. Working principle of the canister purge valve: When the car engine is turned off, the canister begins to absorb fuel vapors evaporating from the fuel tank to prevent them from being released into the atmosphere and causing environmental pollution. When the car engine is started, the fuel vapors adsorbed in the canister are then delivered to the engine as fuel for operation.
As a car owner who enjoys DIY maintenance, I believe the carbon canister purge valve doesn't have a fixed replacement interval—it mainly depends on vehicle usage and symptoms. For city driving with frequent short trips and traffic congestion, the valve works more often and wears faster, potentially needing inspection or replacement every 3-5 years. Cars driven mostly on highways last longer, easily going 7-10 years. From my experience, pay attention after reaching 80,000 km—if symptoms like rough idling, increased fuel consumption, or unusual exhaust odors appear, it's time for a new one. With proper maintenance, having technicians check wiring and connections during routine servicing can extend its lifespan. Neglecting it may cause engine issues or excessive emissions, so address minor repairs early to avoid costly fixes later.
