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2005 chev silver 4wd ext cab 4.3 evap solenoid problem

I have the same problem as others, my code is p0455 faulty evap solenoid. gm dealer wonts 367.00 to do job, if i could get the part i can change mit myself, any help out there?

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I had the same code on my 2005 Tahoe. I kept getting the tighten fuel cap warning and code P0455. I just replaced the Fuel Tank Evaporator Control, GM part # 25932571. List price is $28.27. On the Tahoe it is located on the passenger side in front of the rear axle next to where the exhaust goes up and over the axel. With a lift it took about 20 minutes to replace it. I don't know if the location is the same on the Silverado. GM parts direct has the part for $14 and change with another $12 and change for's easier to go to the dealer and pick it up.

Posted on Sep 08, 2009


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Dec 19, 2015 | 2000 Chevrolet Chevrolet Cavalier Base

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What are these codes and what they means p0732, p01448.p0455

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:

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Jan 02, 2015 | 2003 Nissan Maxima

2 Answers

045500 error code on a Chev silverado 1500 2009 5.3 lt what does it say

DTC P0455
  • Evaporative Emission (EVAP) System Large Leak Detected

Jul 23, 2014 | 2009 Chevrolet Silverado 1500

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Engine light code p0455 chev monte carlo

Hello,The problem is that the EVAP system is not able to achieve or maintain vacuum during the diagnostic testThe control module tests the evaporative emission (EVAP) system for a large leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running the test are met, the control module commands the EVAP canister purge solenoid valve OPEN and the EVAP canister vent solenoid valve CLOSED . This allows engine vacuum to enter the EVAP system. At a calibrated time, or vacuum level, the control module commands the EVAP canister purge solenoid valve closed, sealing the system, and monitors the FTP sensor input in order to determine the EVAP system vacuum level. If the system is unable to achieve the calibrated vacuum level, or the vacuum level decreases too rapidly, the PCM will set the code you now have.So, you either have a stuck open purge valve, a stuck open vent valve, a false reading fuel tank pressure sensor, or a cracked/broken EVAP line.

Sep 21, 2012 | 2004 Chevrolet Monte Carlo

1 Answer

How do I resolve diagnostic code P0455 on my 2005 Chevrolet Tahoe?

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.
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Aug 26, 2012 | 2005 Chevrolet Tahoe

1 Answer

I have a 2001 Mitsubishi Galant and my son received 4 codes off of the programmer. The recent one is P0300, then the next 3 are P0441, P0335, P0455. Can you tell me what the codes stand for

A code P0300 may mean that one or more of the following has happened:
  • Faulty spark plugs or wires
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector(s)
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Stuck/blocked EGR valve / passages
  • Faulty camshaft position sensor
  • A code P0441 could mean one or more of the following has happened:
    • Bad vacuum switch
    • Broken or damaged EVAP line or canister
    • Open in PCM purge command circuit
    • Open or short in Voltage feed circuit to Purge Solenoid
    • Faulty purge solenoid
    • Restriction in EVAP solenoid, line or canister
    • Corrosion or resistance in purge connector
    • Bad PCM
    Defective computer

Mar 13, 2011 | Mitsubishi Galant Cars & Trucks

1 Answer

My 2005 Tahoe has engine light codes P0449 & P0455. What should I replace first?

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

Aug 24, 2010 | 2005 Chevrolet Tahoe

2 Answers

2005 vibe with a evap codes P0441 & P0455 what my next step

A lot of times, an evap code can be set by running the vehicle with the gas cap off. Also, if the gas cap is faulty, it can set the code as well. You may want to check the cap first (at least it's fairly inexpensive) and make sure it's sealing correctly. You can have the code reset at Auto Zone or Advance Auto Parts. If the code comes back, you may want to consider changing the cap, but make sure you replace it with the correct one. Not all gas caps will do the trick, resulting in the code just coming back. I would recommend purchasing it from the dealer.

I hope this helps to get you started! :)

Aug 05, 2010 | 2005 Pontiac Vibe

2 Answers

Getting codes P0455 and P0449. From what I read,

The vent solenoid valve has been redesigned to correct the problem you are having. I would recommend purchasing the dealer component.
I am not aware of any aftermarket parts suppliers.

Feb 25, 2010 | 2005 Chevrolet Avalanche

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