How to Solve the Abnormal Noise from the Canister Purge Solenoid Valve?
3 Answers
Carbon canister purge solenoid valve makes abnormal noise because the carbon canister will produce intermittent switching actions when the throttle is opened, which will cause noise. This is a normal phenomenon. The following are the inspection methods for the carbon canister purge solenoid valve: 1. Preheat the car engine to normal temperature and let the engine idle. 2. Remove the vacuum hose on the vapor recovery canister and check whether there is vacuum suction. If there is no vacuum suction in the vacuum tube, the carbon canister purge solenoid valve will close when the engine is idling. If there is vacuum suction in the vacuum tube, the carbon canister purge solenoid valve should be in the open state at this time. 3. Step on the accelerator pedal. When the engine speed reaches 2000r/min, check whether there is vacuum suction in the vacuum tube. If there is vacuum suction, it means the system is working normally. If there is no vacuum suction, use the 20V voltage range of a multimeter to check whether there is voltage in the solenoid valve. If the voltage display is normal, it means the solenoid valve is faulty. If the voltage display is abnormal, it means there is a circuit fault.
When dealing with car maintenance, I've encountered many cases of carbon canister purge valve noise, most commonly caused by the valve sticking or dust accumulation leading to vibration sounds. First, turn off the engine and check if the valve mounting bolts are loose—try retightening them to see if the noise disappears. If the problem persists, it might be due to internal valve wear or poor electrical contact, requiring disassembly for cleaning or direct replacement with a new valve. For DIY repairs, you'll need screwdrivers and spare parts, but if you're unfamiliar with the procedure, it's best to visit a professional repair shop to avoid damaging other components. Ignoring this issue can affect fuel evaporation efficiency and even trigger the check engine light. I recommend regular cleaning of the engine compartment to prevent dust ingress and reduce the likelihood of noise occurrence.
I also had the experience of hearing strange noises from the charcoal canister solenoid valve while driving recently. The buzzing sound was really annoying. After searching online, I learned that solenoid valve noises could be caused by loose wiring or valve movement issues. I tried opening the hood, disconnecting the power, and checking the wires and connectors. After tightening them, the noise reduced by half, but it was still somewhat audible. Later, I took it to a repair shop and found out the valve body was aged and corroded. Replacing it with a new part only cost a little over a hundred yuan. After the repair, everything became quiet again. I learned a lesson: unusual noises often indicate minor faults, and timely action can prevent issues with the emission system or increased fuel consumption. Fellow drivers, if you encounter this, don’t delay—do a quick check and then let the professionals handle it.
