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TOYOTA SIENNA 2001 CANISTER

CODE P0440, P0141, P0146

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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jschoon77
  • 55 Answers

SOURCE: p0440,p0441,p0446

These codes are all for the Evaporative Emissions System.

P0440- Evaporative emissions system fault- just saying there's something wrong with the system.

P0441- Evaporative emissions system- Incorrect purge flow- saying that the system isn't purging the raw fuel vapors (hydrocarbons- HC) as well as it should.

P0446- Evaporative emissions system- Control valve circuit low- there is a valve, usually located on the charcoal canister at the rear of the vehicle, that opens to allow fresh air to enter the evaporative emissions system as the engine vacuum purges the fuel vapors from the charcoal canister and closes when purge is not needed to prevent leakage of those fuel vapors to the atmosphere (HC is a greenhouse gas and is regulated as such by the fed gov't).

Given that you have the incorrect purge flow code and the control valve code together, my bet is that the vent control valve has failed (causing the P0446) and is not opening to allow fresh air into the system to displace the air from within the system that is being pulled to the engine. Since you have no fresh air entering the system, the engine will pull a vacuum on the system instead of the vapors "flowing" into the engine (causing the P0441).


I hope that this is helpful to you!!!


ASE Master Technician with L1 and X1 Certifications; Nissan Scope Technician; Chrysler Level 3 Silver Technician- 12+ years experience.


Posted on Nov 17, 2008

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bschilz
  • 2049 Answers

SOURCE: I have a 2001 Toyota Sienna with a P1135 code

P1135 (for Toyota) means A/F Sensor Heater Circuit Malfunction Bank 1 Sensor 1 (Set when the heater operates, heater current exceeds 8A or heater current of 0.25A or less).
The A/F sensor contains a ECU-controlled heater. At start-up, the heater helps warm the A/F sensors to quickly operating temperature. With minimal exhaust gas flow, the heater keeps the A/F sensor from cooling down.

Posted on Sep 17, 2009

  • 114 Answers

SOURCE: i can't find knock sensor location bunk 2 toyota sienna 2001

It's under the intake manifold...oh joy

Posted on Sep 19, 2009

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  • 7353 Answers

SOURCE: 2001 Alero code p0440.

there is still a small leak, the shop thats doing the testing can repair it? right? Usually these things are just one item, you may have more than one.

Posted on Sep 28, 2009

johnjohn2
  • 5763 Answers

SOURCE: my 2002 toyota sienna has evap system malfunction

You are on the right track, you replaced the vent valve and replaced the vsv valve in the engine compartment that should of solved the problem as long as the correct valves were replaced, i would check for a leak in a hose for the evap system, a smoke test would be a good way, the canister may not be the problem but the valves on the canister, there are a few vsv valves on the canister and also the pressure sensor, the switching valve is very common also, there are so many valves thats why the dealer replacing the canister as an asm, hope this helps also make sure gas cap is good.

Posted on Jan 07, 2011

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1 Answer

What are the probable causes for DTCs P0440 P0441, and P0446?


code p 0440 refers to EVAP system--system malfunction==causes --hose connections --intake leak---EVAP canister purge valve
code p 0441 refers to EVAPO system --incorect flow detected ====causes --hose connections ---intake leak---EVAP canister purge valve
code p 0446 refers to EVAP system---vent control--circuit malfunction====causes wiring---EVAP canister purge valve ---ecm
replace the purge valve
as to where it is , the location will be in the workshop manual or have a shop point it out to you.

Aug 29, 2015 | 2001 Toyota Camry

1 Answer

Hello there,my 2001 echo is lighting up trouble codes p0440 p0441 p0446; how and where should i start?


code p0440 refers to evaporative emission (EVAP) system--malfunction=== causes --hose connections --intake leak--EVAP canister purge valve
code po441 refers to EVAP --incorrect flow detected==causes the same as for po440
code po446 refers to EVAP system vent control --circuit malfunction===causes --wiring---EVAP can purge valve--ECM
generally I would replace the purge valve as it is common to all codes

Feb 03, 2014 | Cars & Trucks

1 Answer

2001 Toyota Sienna LE - CEL with P0440, P0442 & P0446 codes


I cant give u a 100% diagnosis from here but the most common problem is the purge valve. Separate parts.

Mar 04, 2017 | 2002 Toyota Sienna

1 Answer

2001 toyota sienna 02 heater circuit bank 1 sensor 2


Sound like a DTC P0141 - O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)

A code P0141 may mean that one or more of the following has happened:
* open or short to ground in the wiring harness
* O2 heater circuit wiring high resistance
* O2 heater element resistance is high
* Internal short or open in the heater element

Note: Typically a failed catalytic converter does not cause this code. You're more likely to see a P0420 code for a failed converter.

Mar 16, 2011 | 2001 Toyota Sienna

1 Answer

P0330


Have the same problem on my 2001 Sienna with 184k miles. Knock sensor is the p0330 or p0325 code. Here is a walkthrough of the fix:
http://www.findonefindall.com/toyota-sienna/toyota_knock_sensor.htm

Jul 13, 2010 | 2001 Toyota Sienna

1 Answer

2001 Alero code p0440.


there is still a small leak, the shop thats doing the testing can repair it? right? Usually these things are just one item, you may have more than one.

Sep 28, 2009 | 2001 Oldsmobile Alero

2 Answers

I have a 2001 Sienna and havs the P0446 code. What


Evaporative emissions control vent circuit low http://wiki.answers.com/Q/What_does_OBDII_code_P0446_Evaporative_emissions_control_vent_circuit_low_mean


Jun 20, 2009 | 2002 Toyota Camry

2 Answers

Obd code p0440 for check engine light on 2000 Toyota Corolla


p0440 code means that the evap system has a leak. This could be caused by a bad or improperly installed gas cap. Either that or the purge solenoid has failed or the canister is plugged and not working properly.

Nov 15, 2008 | 2001 Toyota Corolla

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