What are the symptoms of a faulty charcoal canister purge solenoid valve?
2 Answers
The symptoms of a faulty charcoal canister purge solenoid valve include: gas leakage in the car, abnormal vehicle operation; strong gasoline odor inside the car; unstable engine idle speed with poor acceleration; engine stalling or difficulty starting, etc. Below is more information about the charcoal canister purge solenoid valve: 1. How the charcoal canister purge solenoid valve works: When the car is started, the solenoid valve controls the charcoal canister to open, allowing the absorbed fuel vapor to be reintroduced into the intake manifold for combustion, aiming to save fuel and protect the environment. 2. The role of the charcoal canister purge solenoid valve: The charcoal canister purge solenoid valve is located between the charcoal canister and the intake manifold, controlling whether the stored fuel vapor in the canister can enter the combustion chamber via the intake manifold for combustion. If the charcoal canister purge solenoid valve is damaged, it will not only increase fuel consumption but also affect the normal operation of the car's engine.
Last time my old car had a faulty charcoal canister purge valve, the symptoms were quite noticeable. First, the check engine light suddenly came on, and the diagnostic scan at the repair shop showed an evaporative system issue. The engine idled roughly, especially when stopping at red lights—the steering wheel would vibrate noticeably. Fuel consumption also increased by about 10% compared to normal. Refueling became particularly difficult; the pump nozzle kept clicking off automatically, requiring multiple attempts to fill the tank. There was also a faint gasoline smell inside the car, especially noticeable after parking. I recommend getting it checked immediately if you notice these signs—DIY repairs are complicated, as specialized equipment is needed to test the system's sealing. It's best handled by a professional repair shop.
