P0446 Help - Camry Forums - Toyota Camry Forum

General Tech Good at troubleshooting? Have a non specific issue? Discuss general tech topics here.

P0446 Help

Reply

 
 
 
  #1  
Old 02-12-2018, 05:24 PM
Junior Member
Thread Starter
Join Date: Feb 2018
Posts: 3
Default P0446 Help

I have a 99 Camry 3.0 which tripped a P0446 code a few months ago. We have had the Evap canister completely replaced and the solenoid valves on the fuel rail have also been replaced. We have also replaced the fuel cap with a Toyota cap from the dealer. The code stills pops up and there also been a PIN test performed on the ECM. Any ides as to what could be tripping the P0446 code still?
 
Reply With Quote
  #2  
Old 02-12-2018, 07:27 PM
Super Moderator
Join Date: Jan 2008
Location: PTW
Posts: 11,157
Default

You have service information?

Here is the list of possible problems.

Open or short in VSV circuit for EVAP
Open or short in VSV circuit for vapor pressure sensor
Open or short in vapor pressure sensor circuit
Bad VSV for EVAP
Bad VSV for vapor pressure sensor
Bad vapor pressure sensor
Charcoal canister cracks, holed or damaged
Fuel tank over check valve cracked or damaged
Vacuum hoses blocked, damaged or disconnected

Check for air leaks in the EVAP system and fuel tank.

The code is stating when the VSV for vapor pressure sensor (VPS) is off. There is no continuity between the VPS and canister.

When the VSV for VPS is on. There is no continuity between the VPS and fuel tank.

Or after purge cutoff, the canister is at atmospheric pressure.

There is an air leak in the EVAP system or a bad VSV, VPS or wiring to it.
 
Reply With Quote
Reply
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
colsoncj
ECU & Electronics
5
10-03-2012 11:35 PM
calinative
General Tech
10
11-06-2011 01:03 PM
selanac
DIY - Do It Yourself
5
09-02-2011 03:55 PM
kchayes3
General Tech
3
08-31-2009 08:09 PM
luka2sb
General Tech
0
07-06-2008 04:18 PM


Thread Tools
Search this Thread