P0440 on a Volvo: Causes, Fixes & Repair Cost

🟢 Low severity · drivable

Safe to keep driving — this is a general emissions-system fault, not a mechanical issue — but fix it before your next emissions test.

What P0440 means on a Volvo

On a Volvo, P0440 means the engine computer found a general problem in the evaporative emission (EVAP) system that stores fuel vapors from the tank. It is the catch-all EVAP code, less specific than the leak-size codes P0442, P0455, and P0456, so it often appears with other EVAP codes. The car keeps running and driving normally.

Is P0440 common on Volvos?

P0440 shows up on Volvos as the EVAP hoses and valves age, with a loose gas cap being the first thing to check on this brand. Cracked rubber lines near the engine and a worn purge valve are common follow-ups. It is an emissions issue, not a drivability issue.

Commonly reported on: XC60, XC90, S60, V60.

Symptoms

Check engine light on
Possible faint fuel smell
No drivability symptoms

Common causes

most common: Loose, missing, or failing gas cap
common: Cracked or aged EVAP hoses
common: Faulty purge valve
less common: Leak at the fuel filler neck seal

How to fix it

Fix	DIY?	Typical cost
Tighten or replace the gas cap	Yes	$10–30
Replace cracked EVAP hoses	Yes	$20–80
Smoke test the EVAP system to locate the leak	Mechanic	$50–150
Replace the purge valve	Yes	$70–170