Question about 2005 Buick LeSabre

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2005 LeSabre check engine light on due to evaporative emissions

I am wanting a diagram of the evaporative emissions system on a 2005 Buick LeSabre. Check engine light came on pulled the code and was a minor leak.

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Finding a leak in these emission systems is almost impossible.
All it takes is a pin hole in a hose to screw up the whole system.
The best way to find the leak is to take and have a smoke test done on it. Smoke is injected into the system and where ever the leak is , the smoke will leak out of it. It's faster and more reliable then replacing hoses and other things you don't need. Call dealers, or repair shops to see who does smoke tests.

Posted on Apr 23, 2010

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Posted on Jan 02, 2017

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Location for 2006 buick rainier EVAP purge solenoid


You should have an EVAP leak test done . It could be a leaking purge valve , you could need a new gas cap as well or it could be the fuel filler neck . or assorted hoses or the fuel tank pressure sensor . If the check engine light is lit there will be a code .
DTC P0442: Evaporative Emissions (EVAP) System Small Leak Detected or
DTC P0455: Evaporative Emission (EVAP) System Large Leak
DTC P0446: Evaporative Emissions (EVAP) Vent System Performance
You have to jack up the vehicle , the purge valve is attached to the engine behind the A/C compressor .

Dec 01, 2015 | 2006 Buick Rainier

1 Answer

Have a light came on that says gas cap losse i but new on on and still says same thing what do i do


The error may be cause by a loss of pressure in the evaporative emissions control system. I don't have any service information on the 2005 LeSabre, but I suspect that a hose is leaking or loose between the gas tank and the charcoal cannister. Have your dealer or a good trustworthy mechanic follow the vapor recovery hose from the cannister to the tank.

Jun 14, 2014 | 2005 Buick LeSabre

1 Answer

Evaporative emissions


Google the Evap Code you got
If that sensor is on top of fuel tank,
you what has to be done
Use the internet to find the solution
Need a professional scan tool & maybe a smoke
machine to work on the Evap System.

Jul 19, 2013 | Buick Cars & Trucks

1 Answer

Evaporative Emission Control System


The purge solenoid is inder the plastic engine cover just to the passenger side of the oil fill cap. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

Feb 17, 2012 | 2001 Buick LeSabre

1 Answer

P0440 and P0302 scan code - changed plugs and wires. Changed emission purge valve. All vacuum lines appear to be OK. Fuel lines are not leaking. Good spark to cyclinder two when using spark tester. ...


Cylinder 2 Misfire Detected po302 . Evaporative Emission Control System po440 The last digit on a misfire code indicates the cylinder number. A code P0302, for example, would tell you cylinder #2 is misfiring. Chances are the misfire is due to a weak ignition coil. Did you change the pcv valve? Remember to put the o-ring on the new one or this problem will happen.

Sep 24, 2011 | 1997 Buick LeSabre

1 Answer

What is code po453 on a 2002 buick lesabre custom


P0453 - Evaporative Emissions Control System Pressure Sensor High Input

The EVAP (Evaporative Emissions) System allows fuel tank vapors to be purged into the engine and burnt rather than expelled into the atmosphere as harmful emissions. The EVAP system contains a pressure sensor to check the integrity of the system. Periodically, the EVAP system performs a pressure test to check that there are no leaks in the system. It uses this sensor, also known as a fuel tank pressure (FTP) sensor to check for leaks. Basically P0453 means the PCM (Powertrain Control Module) noticed the EVAP Pressure sensor or FTP is indicating a higher than normal pressure (above 4.5 Volts) in the EVAP system. NOTE: On some vehicles the FTP is a part of the fuel pump assembly in the tank.

Potential Symptoms: There will likely be no noticeable symptoms along with this code other than the MIL (Malfunction Indicator Lamp), commonly known as Check Engine Light illumination. However, there may be noticeable fuel odors in some cases.

Causes: A P0453 DTC trouble code may be caused by one or more of the following:
Open on FTP sensor signal wire
Short to voltage on FTP sensor signal wire
Bad FTP sensor
Abnormally high pressure in fuel tank due to blockage in EVAP purge hoses or overfilled tank
Loose/damaged FTP sensor connector
Loss of ground to the sensor

Possible Solutions: Using an scan tool access FTP sensor value with Key on Engine off (KOEO). Normal value is usually somewhere near 2.5 Volts at atmospheric pressure (may fluctuate some due to altitude). It shouldn't ever be above 4.5 Volts:
1.- If it is close to 2.7V with the gas cap off, the problem is likely intermittent. Using a Digital Volt Ohm Meter, measure the voltage on the signal wire while trying to induce the problem by wiggle testing all the wiring at the FTP sensor. If the voltage fluctuates when wiggle testing, check for connector problems; i.e. water in the connector, broken or chafed wiring.
2.- If the value shown on the scan tool is above 4.5V, unplug the sensor (if possible) and check for voltage again. If the high voltage is still present when unplugged, inspect wiring harness for a short to voltage on the signal wire. If the high voltage disappears when unplugging the sensor, check for a good ground to the sensor and proper reference voltage. If you have a good ground and 5 Volts reference voltage, replace the FTP sensor since it's likely shorted out.

Hope this helps.

Jun 21, 2011 | 2002 Buick LeSabre

3 Answers

Have a code p0449 have. already changed the evap vent solenoid . any suggestions?


P0449....Evaporative Emission Control System Vent Valve/Solenoid Circuit could be the engine breather

Dec 24, 2010 | 2002 Buick LeSabre

2 Answers

Codes 441, 446, 455 on a 2005 Camery


P0441 Evaporative Emission Control System Incorrect Purge Flow
P0446 Evaporative Emission Control System Vent Control Circuit Malfunction
P0455 Evaporative Emission Control System Leak Detected (Gross Leak)
http://www.toyotanation.com/forum/showthread.php?t=128923

Jun 04, 2009 | 2004 Lexus LS 430

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