Barryst

Hi!

Does anyone know what could cause this code P0446?

I recently came back from a long trip, and my check engine light came on.

I went to AutoZone and borrowed their OBD2 tool and it had this code stored twice.

Anyone have any ideas?

Thanks,
Barry

evilxlexso

your not the only one... my came on the other day ... p0440 p0441 p0446

Tammy

Welcome !

By using the "search" function above, a P0446 search provides 33 hits.

https://www.clublexus.com/forums/sho...ighlight=P0446 ..for example

This is the possible "loose fuel filler cap, bad O-ring seal on the filler cap" error.

The emission EVAP control system - vent control circuit malfunction.

Opinion has it this a symptom of overfilling when fueling.

It may be a warranty repair if you have less than eighty thousand miles.

Is the error solid and currently causing an Check Engine Light(CEL) or it the problem intermittent?

Barryst

Hi Tammy:
Thanks for the reply!

My check engine light comes on and stays on. I tried pulling the fuse a couple of times, but the light comes on within an hour or so.

I do have a lot of miles (173,000) I was wondering if a new fuel cap would help.-

I just completed installing a new air-fuel sensor bank one, sensor one, against the firewall about 3 weeks ago and haven't had any re-occuring
codes.

I don't know what else to try, it doesn't look like many other Lexus owners are having this problem yet.

I LOVE my '99 RX300!

Hardly any issues up to now, compared to the Americian cars I USED to own...

Barry

OceanView

Barry,

Did you ever get it fixed?
If so what was the problem?
I just got the same code and was wondering.

Thanks

palaka

you probably have a vacuum leak it happen on my mitsubishi code says evaporative some thing found out one of my vaccum rubber hose has a lot of cracked.

rl9905

Two days ago, my Check Engine Light Came on and today i went to Autozone and borrowed the OBD2 device and the exact code came up like yours p0440 p0441 and p0446. I have almost 55k miles on it and This coming monday i'm gonna have it serivice at Lexus for 55k mile and i'm gonna tell them to look at the check engine light. I'll let you guys know what it is