BMW P0446 Code

When it comes to BMW P0446 Code, it is important to understand what this code means and what causes it. This code is an indication that the vehicle’s evaporative emissions control system has detected a large leak. In order for this code to be triggered, the engine must be started and all electrical components must be off, the parking brake must be engaged, the automatic transmission selector must be in park, and the exhaust system must be properly sealed. Common causes for this code include aftermarket EVAP hardware that does not meet specifications, EVAP canister tube, EVAP canister purge outlet tube, or EVAP return tube being disconnected or cracked, or the canister being damaged, and the EVAP canister purge valve being stuck closed or the canister being damaged.

Causes and Solutions for BMW P0446 Code

Cause Solution
Aftermarket EVAP hardware non-conforming to specifications Replace with OEM parts
EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube disconnected or cracked, or canister is damaged Replace the damaged parts
EVAP canister purge valve stuck closed, or canister damaged Clean or replace the canister
Fuel Leak Replace the fuel lines

Aftermarket EVAP Hardware

When it comes to BMW P0446 Code, the biggest cause of this code is aftermarket EVAP hardware that does not meet specifications. This means that the parts used to replace the original EVAP hardware do not meet the same specifications as the OEM parts. In order to resolve this issue, it is important to replace the aftermarket EVAP hardware with OEM parts.

See also  BMW P0355 Code

EVAP Canister Tube, EVAP Canister Purge Outlet Tube, and EVAP Return Tube

Another common cause of BMW P0446 Code is the EVAP canister tube, EVAP canister purge outlet tube, or EVAP return tube being disconnected or cracked, or the canister being damaged. If any of these components are damaged, it is important to replace them with OEM parts.

EVAP Canister Purge Valve

The EVAP canister purge valve can also be the cause of BMW P0446 Code. If the valve is stuck closed or the canister is damaged, it is important to clean or replace the canister.

Fuel Leak

Finally, a fuel leak can also cause BMW P0446 Code. If a fuel leak is detected, it is important to replace the fuel lines.

Conclusion: Resolving BMW P0446 Code

The BMW P0446 Code is an indication that the vehicle’s evaporative emissions control system has detected a large leak. There are a variety of causes of this code, including aftermarket EVAP hardware that does not meet specifications, EVAP canister tube, EVAP canister purge outlet tube, or EVAP return tube being disconnected or cracked, or the canister being damaged, and the EVAP canister purge valve being stuck closed or the canister being damaged. In order to resolve this issue, it is important to replace any damaged parts with OEM parts and replace the fuel lines if a fuel leak is detected. With the proper knowledge and tools, it is possible to resolve BMW P0446 Code quickly and effectively.

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