What is code P0446 and P0441 on a 1998 Toyota Corolla VE and how do you repair it?

Answer 1

po441 is incorrect purge flow po446 is vsv vapor pressure sensor

Before you do anything examine the gasket at the gas cap. Clean it with light oil. Tighten gas cap until you hear at least 3 clicks. DO NOT refuel car with engine running and do not overfill tank by "topping off" after fuel nozzel clicks off at the gas station. All these have been known to cause P0441 & P0446.

P0441 and 0446 relate to the vapor cannister control system near the gas tank. Toyota had a "secret warranty" on these for 14 yrs and 140,000 miles. Google search Toyota EPA settlement for details on how to identify if your car is covered. How do I know? After much back and forth I finally got a dealer to change this assembly. At first they wouldn't admit knowing anything about it. But their own mechanic told me they always have 5-10 assemblies in parts stock. This is an ongoing problem.

i can validate that - i had a 98 corolla and recently had a " broken vapor canister" giving codes 441 and 446 - after googling and this answer helped me save more than $500 that my local mechanic wanted to replace the canister. difficult investement since the vehicle is usally not worth more than $2500

Toyota gave me a bit of hassle - but finally relented and fixed the problem.