Question about 2002 Toyota Corolla

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Check engine light came on. Told it was a vapor sensor. What does that mean?

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  • krave64 Jul 07, 2008

    I had my car dx'd as the check engine light kept coming on and re'c a P1448 Vent Control Valve code. 03 Nissan Maxima



    What does this mean? High dollar, major problem?



    Can I fix it myself?

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Hi
it was a part of (EVAP) system
Evaporative emission control system
this system pull up the fuel vapor from fuel tank and send it to the engine to burn it
this system work to low emission ,fuel tank vent and economy of the fuel vapor
this system have a parts
1-canister purge valve
2-vent control valve
3-vent valve
4-pressure sensor
5-hoses and pipes connections
with my best wishes

Posted on Jul 03, 2008

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My corolla 2001 the engine light is on test by computer show po446 problem


P0446 Evaporative Emission Control System Vent Control Malfunction
 Vacuum hose cracks, holed blocked, damaged or disconnected (1), (4), (5), (6) and (7)
 Open or short in vapor pressure sensor circuit
Vapor pressure sensor
 Open or short in VSV circuit for vapor pressure sensor
 VSV for pressure switching valve for vapor pressure sensor
 Charcoal canister cracked, hole or damaged
 Fuel tank over fill check valve cracked damaged
 ECM

Aug 30, 2011 | Toyota Corolla Cars & Trucks

1 Answer

Service engine light is on....had checked and I'm told that I need to have my Fuel pressure sensor checked or changed...how can I be sure???


What was the fault code that triggered the engine light? The fuel pressure sensor on the Escalade monitors vapor pressure within the fuel tank to determine whether a leak has occurred and sends the information to the EVAP system to recirculate the fuel vapor.

Aug 21, 2011 | 2002 Cadillac Escalade Ext

2 Answers

Service engine light on, p0455,


Hi,

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P0455 = Evaporative Emission Control System Leak Detected (gross leak)

What does that mean?

This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large leak has been detected. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.
Symptoms

You likely won't notice any drivability problems.

Causes

A code P0455 most likely means one or more of the following has happened:
  • A loose or improperly affixed gas cap
  • A non-conforming gas cap (i.e. not factory/original brand)
  • Other leak or damaged piece in EVAP system

Possible Solutions

With a P0455, the most common repair is to:

  • Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
  • Otherwise, replace the gas cap, and/or
  • Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary
All the best

Ben

Jun 05, 2011 | 2000 Ford Expedition

2 Answers

Check engine light came on went to auto zone said it was gas cap. Bought new gas cap. reset engine light. two days later check engine light is back on. what next?


Hi, if the code was P0455, there are other possible reasons. The computer fuel tank pressure sensor has detected a leak which could also be in the vapor canister, or the hose from the canister to the purge valve, or the purge valve itself may be leaking. Please inspect the system for these leaks. I may be able to provide some pics of these parts if you tell me your model, year, and engine info.

Evaporative Emission Control System Leak Detected (no purge flow or large leak)
What does that mean? This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large leak has been detected. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.
Symptoms You likely won't notice any drivability problems.
Causes A code p0455 most likely means one or more of the following has happened:

  • A loose or improperly affixed gas cap
  • A non-conforming gas cap (i.e. not factory/original brand)
  • Other leak or damaged piece in EVAP system
Possible Solutions With a p0455, the most common repair is to:
  • Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
  • Otherwise, replace the gas cap, and/or
  • Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary

May 14, 2011 | Chevrolet 2500 Cars & Trucks

2 Answers

Hello my 2000 toyota echo's check engine light is on and it is reading error codes po440,po441,po446 I was told it is something with the emissions what is the problem


It's probably the 02 sensor (technically dealing with the exhaust) which will make it fail emissions. I have been told it may also be a dirty mass air flow sensor, which is located in the same housing as the air filter box. I am having the same problems myself, and the car is hesitating and has no power.

Aug 24, 2010 | 2001 Toyota Corolla

2 Answers

Location of sensor for troubleshooting po442 to cause check engine light to come on


P0442 OBD-II Trouble Code - Evaporative Emission Control System Leak Detected (small leak)

What does that mean?
This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.


Symptoms
You likely won't notice any drivability problems.


Causes
A code P0442 most likely means one or more of the following has happened:
* A loose or improperly affixed gas cap
* A non-conforming gas cap (i.e. not factory/original brand)
* A small leak/hole in a fuel vapor hose/tube
* Other small leak in EVAP system
* Faulty vent o-ring seal


Possible Solutions
With a P0442, the most common repair is to:
* Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
* Otherwise, replace the gas cap, or
* Inspect the EVAP system for cuts/holes in tubes/hoses


46b629a.jpg

Fig. EVAP vent solenoid (2) on 3.1L, 3.4L, 3.5L & 3.8L, showing the connector (1) and vapor line (2)


510065b.jpg

Fig. EVAP canister purge solenoid location on 3.1L & 3.4L


a193655.jpg

Fig. EVAP purge solenoid valve (3) location on 3.5L




Hope this help, good luck.

May 11, 2010 | 2002 Buick Century

2 Answers

I am getting codes Po449 and P0455 on my 2004 GMC Sierra 1500. I put a new fuel cap and then had the computer reset. The engine light went away but came back later that day. What do you suggest I do nest?


This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large leak has been detected. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

Assuming you put on the proper gas cap and one of high quality, I would inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary.

Mar 12, 2010 | 2004 GMC Sierra 1500 Crew Cab

1 Answer

Temp sensor needs to be replaced


this does not mean the sensor is defective, it most likely means the engine thermostat is stuck open and the engine is not running hot enough to satisfy the computers preset temp requirements for minimum eng operating temp.

Apr 08, 2009 | 2002 Daewoo Lanos

3 Answers

I have a 2005 Chevy Malibu. The check engine


"This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine."
Hope that helps..

Mar 25, 2009 | 2005 Chevrolet Malibu

1 Answer

Code 0440


P0440 onepx.gif EVAP Control System Malfunction onepx.gif onepx.gif onepx.gif onepx.gif onepx.gif onepx.gif onepx.gif onepx.gif Possible Causes onepx.gif Setting Conditions onepx.gif onepx.gif onepx.gif onepx.gif
  • Charcoal canister is clogged, loaded with fuel or with moisture
  • Fuel filler cap missing, loose (not tightened) or the wrong part
  • Fuel tank over-fill check valve cracked or damaged
  • Fuel tank seal leaking, fuel tank cracked or damaged/leaking
  • Fuel vapor hoses/tubes blocked or restricted, or fuel vapor control valve tube or fuel vapor vent valve assembly blocked
  • Vacuum hose or tubing cracked, damaged or disconnected
  • Vapor Pressure sensor incorrectly installed
  • PCM has failed
onepx.gif Engine started cold (ECT sensor signal less 86�F), engine runtime over 20 minutes in closed loop, vehicle driven to a speed of 55-60 mph, and the PCM detected the fuel tank pressure indicated the same value as the atmospheric pressure in the EVAP Monitor test.
This code sets in 2 Trip(s).First I would try making sure the gas cap is tight. You need to give it 2 trips before it may reset. The other choice would be to replace it, Cheaper than spending money on a professional.

Jan 25, 2009 | 2002 Lexus IS 300

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