EVAP smoke testers

Last updated · OBDCode UK editorial

A smoke tester pushes a little vapour into EVAP, vacuum or intake plumbing so a leak shows. It needs a sealed system, a safe workspace and a 12V supply. Three shops in this band can take an order. Soft UK-origin lines have been removed from the live homepages; shop-name-as-brand and delivery-copy conflicts remain. None is linked.

Being rewritten

Do not buy this as the default next step on a P0442 or P0455-class code. A garage smoke test is the usual job. We will list a shop only after the manufacturer name is on the page and delivery copy matches the policy.

No verified live price on this page. Historical checkout figures are not a current quote.

How to choose

A smoke machine is for finding a leak you already have reason to look for — a stored evaporative-emission code, a split vacuum hose, or a workshop intake check. It is not a first tool for reading a code, and you do not need to own one for a single leak.

Look for a 12V supply that matches the vehicle, a way to seal the system, and a stated use on EVAP or vacuum — not a generic “smoke for any job” claim. The manufacturer name must be on the shop page. Work outside or in a ventilated bay, away from ignition sources.

Selection checklist

  • A sealed system and a safe 12V supply
  • Stated use on EVAP, vacuum or intake — not a generic smoke claim
  • Ventilated workspace away from ignition sources

You may not need to buy this if…

  • A garage EVAP smoke test is the usual next step — you do not need to own the machine
  • You cannot seal the system or work with a 12V supply in a safe space
  • Soapy water on a vacuum hose already found the leak
Safety notes

You are putting vapour into a fuel-vapour or vacuum system and running a 12V compressor or pump. Work outside or in a ventilated bay, away from ignition sources. This is not a default DIY step on a consumer fault-code page. If the safety verdict is red, do not start.

Shelf status

Being rewritten

12V EVAP / vacuum smoke machines

Three live shops still sell under the shop name. Soft UK-origin lines on the homepages have been removed; manufacturer naming and delivery copy still fail.

No vetted products yet — we only list suppliers that pass our compliance checks.

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General guidance for UK drivers, not a substitute for a professional diagnosis. Category and supplier review date: 14 August 2026.