TIGHTEN FUEL CAP Message - Check Engine Light on

Discussion in 'Engine & Drivetrain' started by JochenWoern, Oct 9, 2014.

  1. clandr1

    clandr1 Full Access Member

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  2. JochenWoern

    JochenWoern Full Access Member

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    Still having issues

    CHECK ENGINE LIGHT never went off AFTER installaing the following:

    - A new Gas Cap
    - A new AC DELCO CANISTER PURGE SOLENOID VALVE, part #214-2149

    I therefore went to the dealer, who says that the only thing left which could cause my issues is the following:

    - Fuel tank pressure switch, GM Part # 16238399-31133.

    Anyone else had this problem and can you possibly confirm that this is my issue?

    Thanks in advance.
     
    Last edited: Dec 9, 2014
  3. jshaw5

    jshaw5 TYF Newbie

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    Did the fuel tank pressure switch fix the problem?
     
  4. 05YukonXL

    05YukonXL Member

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    Digging up this old thread to inquire ... did the Fuel Tank Pressure Sensor do the trick? I've done the fuel cap, evap canister and evap solenoid (blew out all the charcoal too), still getting check engine. Thanks.
     
  5. ivin74

    ivin74 05 Yukon Denali on 24s

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    Did you use oem parts? Autozone/aftermarket are junk.

    Give it a shot, you got nothing to loose it's the last part that can cause that code. The bad thing is that you have to drop the gas tank to get to the sensor.
     
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  6. HiHoeSilver

    HiHoeSilver Away!

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    What code are you getting? You say evap solenoid. Did you do the vent valve down by the tank, the purge valve up in the engine bay, or both?
     
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  7. treehan77

    treehan77 TYF Fiend

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    The first EVAP canister solenoid i replaced (AC DELCO) was bad. It happens. Easy to bench test though with 12v power.
     
  8. Big Mama

    Big Mama Full Access Member

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    The purge valve/solenoid on top of the engine.
     

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