StopOrDrive

Enter a 5-character code such as P0420, P0301, or P0457.

We don't have that code yet

Codes starting with P are engine and transmission, B are body, C are chassis, and U are network communication. A 0 as the second character means a generic code shared by all makes; a 1 means a manufacturer-specific code, so its meaning depends on your brand.

A steady check engine light usually means get it checked soon. A flashing check engine light means an active misfire: reduce speed and stop driving as soon as it is safe.

That doesn't look like an OBD-II code

A valid code is one letter (P, B, C, or U) followed by four characters, for example P0420.

P0446 EVAP vent control circuit malfunction

Can I drive with P0446?

Drive

Safe to keep driving normally. Fix it when convenient.

It only affects fuel-vapor emissions, not how the engine runs.

What does P0446 mean?

The valve that lets the fuel vapor system breathe (the vent valve) is not working as the computer commands.

What causes P0446?

  1. Faulty vent valve or solenoid
  2. Vent valve or filter clogged with dirt or debris
  3. Damaged wiring or connector
  4. Damaged charcoal canister

How much does it cost to fix P0446?

$100 – $600

Vent valve replacement: $100–$300. Canister: $300–$600 if it is the cause.

Confirm the code yourself

A low-cost scanner lets you read the code, clear it, and see if it comes back before paying for a diagnosis.

Check current price on Amazon. We may earn a commission if you buy through these links. As an Amazon Associate I earn from qualifying purchases.