In my Opel Astra G selection 1.4 I found a blue plug connection, what might be its use?

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It's near the air filter.

  • It is to operate that component at the required times.
    – Solar Mike
    May 19, 2019 at 18:30

2 Answers 2


It's a solenoid which is used to provide vacuum to a component. There are usually two things I've seen it used for:

  1. Exhaust Gas Recirculation (EGR) valve activation
  2. EVAP canister activation

I don't know which it's used for in your vehicle. You'd have to track the lines in both directions and see where it leads to.


It's called a Canister Vapor Purge Valve

  • Hi Colin, welcome to the site. Could you elaborate a bit more on this, perhaps with some information about what it's for?
    – Nick C
    Dec 6, 2021 at 19:29

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