2006 GMC CANYON 4 CYL. Keep getting P0455 code even after replacing then canister vent solenoid valve on the engine and the valve under the truck bed 3 times. What else could it be?

Location

https://www.google.com/search?q=2006+gmc+canyon+canister+purge+valve+location

The Codes

P0455 GMC Code - Evaporative Emission Control System ...

https://www.engine-codes.com > p0455_gmc
P0455 GMC Code - Evaporative Emission Control System Leak Detected Gross Leak · Possible Causes · How To Fix · Tech Notes ? · Cost to Diagnose · Meaning.

P0442 GMC Code Evaporative Emission Control System Leak ...

https://www.autocodes.com > p0442_gmc
Aug 17, 2017 - The P0442 code means that the control module has detected a small leak in the Evaporative Emission (EVAP). Loose fuel tank filler cap is the ...

Under the hood in the engine compartment . The vent solenoid is back by the gas tank ,with the charcoal canister vent valve ! But what makes you think the purge solenoid is the problem ? DTC P0455 Evaporative Emission (EVAP) System Large Leak Diagnostic This could be caused by a few different thing's . Did you have the vehicle smoke tested ? Do you know what that is ?

This code has nothing to do with the purge valve . Evap vent valve . Has nothing to do with intake manifold.
An intermittent condition could be caused by a damaged EVAP vent housing, a temporary blockage at the EVAP canister vent solenoid valve inlet, or a pinched vent hose. A blockage in the vent system will also cause a poor fuel fill problem.
• An EVAP canister, vent hose or vent solenoid valve that has restricted flow may cause this DTC to set. Using purge solenoid valve command with a scan tool will allow vacuum to be applied to the system instead of pressure. With the EVAP canister vent solenoid valve open and the EVAP canister purge solenoid valve commanded to 100 percent, vacuum should not increase to more than 9 inches H2O.
Your best bet , take it to a qualified repair shop.

P0732 Nissan - 2nd. Gear MalfunctionPossible causes
- Low transmission fluid level

- Dirty transmission fluid

- Faulty Shift Solenoids

- Shift Solenoids harness is open or shorted

- Shift Solenoids circuit poot electrical connection

- Transmission mechanical problems

- Transmission hydraulic control circuit



P1448 Nissan
P1448 Nissan - EVAP Canister Vent Control Valve Open
Possible causes

- EVAP canister vent control valve

- EVAP canister is saturated with water

- EVAP control system pressure sensor and the circuit

- Blocked rubber tube to EVAP canister vent control valve

- Water separator

P1448 and P0455: EVAP air leaks - Maxima Forums"Here\'s your answer:

The EVAP codes you are getting are directly related to your

\'vent control valve\'. This is VERY COMMON on this generation

Maxima. Up under yer car behind the left rear wheel is your

EVAP canister. (black plastic box) Your vent control valveis

bolted directly to this canister, with 2 screws. There should

be a vacuum line connected to it. Be sure it IS, and that it

looks like it\'s in good condition.

These valves are notorious for going bad, even more

so than the ignition coilpacks! They dont cause any

decrease in performance, but it usually decreases gas mileage,

and it will cause it to fail emissions testing. But worst of all, it

makes that MIL light on the dash flash...

It\'ll cost ya about $60 from the dealer.. have yer VIN ready..

there are 2 different ones for this generation: 1 with a nipple

and o-ring, the other with no nipple (requires separate o-ring).

Part #\'s: 14935-54u04 OR 14935-54u06



Read more: http://engine-codes.com/p1448_nissan.html#ixzz3NjHQry7v



Read more: http://engine-codes.com/p1448_nissan.html#ixzz3NjHJadBZ

Read more: http://engine-codes.com/p0732_nissan.html#ixzz3NjGYINs7

Here is the definition and possible causes.

Possible causes - Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking
P0455 CHEVROLET Description This diagnosis detects leaks in the Evaporative Emission System (EVAP) purge line using engine intake manifold vacuum. If pressure does not increase, the Engine Control Module (ECM) will check for leaks in the line between the fuel tank and EVAP canister purge volume control solenoid valve under the following vacuum test condition.


The vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the EVAP canister purge volume control solenoid valve. The EVAP canister vent control valve will then be closed to shut the EVAP purge line off. The EVAP canister purge volume control solenoid valve is opened to depressurize the EVAP purge line using intake manifold vacuum. After this depressurization is implemented, the EVAP canister purge volume control solenoid valve will be closed.
Read more: http://engine-codes.com/p0455_chevrolet.html#ixzz24fVfq0Bx

P0449 is the evap vent valve solenoid circuit malfuntion.
P0455 is an evap gross leak
Perhaps the gross leak code has to do with the vent valve. Find the vent valve. It should be near a rectangle evap canister. Maybe under the bed. The small vent line from the fuel tank will go to it. The solenoid is near the cansiter. With the key off the valve will be open. With the key on it should be closed. You may try disconnection the hose and blow through it with both key off and on and see if air will pass through. If the valve has died and is stuck open, that can be the huge leak.

If it is not the leak then a smoke machine should be used. Easier than searching the lines for bad o-rings, splits, or whatevers.

Trouble code P0455-EVAP Control System Large Leak Detected

Trouble Code Conditions:
ECT sensor less than 90°F at startup, engine running, and the PCM detected several small fuel vapor leaks or a large leak in the system.

Possible Causes:

• Aftermarket EVAP hardware non-conforming to specifications
  
• Canister vent (CV) solenoid stuck open
  
• EVAP canister purge valve stuck closed, or canister damaged
  
• EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube disconnected or cracked, or canister is damaged
  
• Fuel filler cap missing, loose (not tightened) or the wrong part
  
• Loose fuel vapor hose/tube connections to EVAP components
  
• Purge sensor or FTP sensor is out of calibration or has failed
  

More than likely the evaporator vent valve.

The PCM has determined that a malfunction exists in the electrical circuit for the vent valve/solenoid in the evaporative emission control system.


Probable Causes
1- Purge or vent solenoids defective
2- Check connevtor and wiring
3- Fuel saturated vapor canister
4- Failed EVAP vent solenoid

Code po449 is the canister vent valve solenoid error.This is a common problem with these valves because they are under the truck in the rear by the spare tire and they get all the dirt and water and snow,if you live in an area where you get snow.You will find it on the canister under the vehicle by the spare tire.