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Exhaust & Emissions

EVAP Smoke Test

A pressurized smoke test that makes even a pinhole leak in your fuel vapor system visible.

Difficulty: easy~0.5–0.8 hrsUnder an hour
Estimated total
$80–140
Parts$0
Labor$80–140
Labor time0.5–0.8 hrs

Diagnostic pricing covers testing and identification of the problem. Repair parts and labor are quoted separately.

Repair costs are not included unless separately selected.

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What's involved

What this repair actually is.

We connect a smoke machine to your EVAP system and fill the lines, tank, and valves with a safe, visible vapor under light pressure. Wherever smoke escapes, that is your leak — this is the definitive way to find the small and large EVAP leaks that set P0442, P0455, and similar codes.

Symptoms

How you can tell.

  • Small leak or gross leak EVAP code
  • Check engine light that keeps returning
  • Failed inspection for an EVAP monitor
  • Fuel smell with no visible leak
Educational estimate. Real pricing depends on your vehicle, the inspection, parts availability, taxes, and shop rates. Use this as a guide while you shop quotes.
Related

Often done together.

EVAP Leak Diagnostic
$90–180
Purge Valve Replacement
$90–360
Vent Valve Replacement
$100–425