Repair Lane

EVAP Leak Diagnostic

We track down the leak in your fuel vapor system that keeps turning on the check engine light.

Difficulty: moderate~0.81.2 hrs1–2 hours
Estimated total
$90–180
Parts$0
Labor$90–180
Labor time0.81.2 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.

The EVAP system captures fuel vapors from the tank so they never reach the air, and even a pinhole leak or a loose gas cap will set a code and block a NY inspection. We scan the codes, test the purge and vent valves, and smoke-test the lines to find exactly where vapor is escaping — it is often just a cracked hose or a worn gas cap seal.

Symptoms

How you can tell.

  • Check engine light with an EVAP or small leak code
  • Fuel smell around the car
  • Light comes back after replacing the gas cap
  • Failed inspection due to an EVAP code
  • Code returns every time you fill the tank
If you delay

You cannot pass NY inspection with an active EVAP code, and escaping fuel vapor wastes gas.

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.