Question about Pontiac Grand Prix

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My car is sputtering, and a diagnostic machine read that the egr valve is malfunctioning. If I buy the part, how difficult will it be to have someone or myself replace it vs spending so much?

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  • steph4115 Dec 10, 2008

    When I drive my car it seems to sputter in the front of the vehicle I have notcied this and I don't know what it is or how to fix it. My car is mostly functioned by computer and I haven't gotten any lights coming up to show any part of the car is malfunctioning, such as the check engine light or oil change light. I don't know what it could be. Help! I have a 2004 Ford Focus SE

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Easy enough to do.
Make sure you get a gasket with a new egr valve.
CLEAN off the old gasket from the engine real good,may have to scrape it off.
Don't let anything fall into the opening,maybe use a paper towel in the opening to keep crud out.
Use some penetrating fluid on the nuts/bolts to help loosen them BEFORE trying to remove,you don't want to snap one off!
Make sure the hole is FULLY open,those cars tend to get the egr system clogged so if ya have a shop vac use it to **** up any crud from the hole.
Place gasket back onto the engine/egr valve and tightem the bolts up snug,ya don't want to crank them down so tight they snap off,just get it all nice and tight/snug.
Don't forget to hook up any hoses from the egr valve!
Start car,test drive.
My old '84 egr system was clogged up badly,so they cleaned the entire system along with cleaning up the throttle body(carb)and installing a new pre-heat assy for the throttle body,she ran smooth after that.
It had about 86,000 miles on it from old owner,i sold it then the oil pump went out on the other owner,those cars can have weak oil pumps so watch your gauges!

Posted on Feb 27, 2009

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    Trouble code P1406 Failed EGR value, Open or short circuit condition Also code P0301 misfire cylinder 1 Next steps? Information for replacing EGR value? 1997 Bonneville SE 105K


    P1406 Code - EGR Valve Pintle Position Circuit
    The PCM monitors the EGR valve pintle position input to ensure that the valve responds properly to commands from the PCM and to detect a malfunction if the pintle position sensor and control circuits are open or shorted. If the PCM detects a pintle position signal voltage outside the normal range of the pintle position sensor, or a signal voltage that is not within a tolerance considered acceptable for proper EGR system operation, the PCM will set DTC P1406.

    CONDITIONS FOR SETTING THE DTC

    Ignition 1 voltage is greater than 10 volts.
    EGR Feedback is less than 0.14 volt at any time.

    OR

    EGR Feedback is 0.4 volt greater or less than the EGR Closed Valve Pintle Position when the Desired EGR Position is commanded to 0%.

    OR

    Actual EGR Position is 20% greater or less than the Desired EGR Position.
    Any of the above conditions are present for longer than 20 seconds.

    ACTION TAKEN WHEN THE DTC SETS

    The PCM will illuminate the Malfunction Indicator Lamp (MIL) during the second consecutive trip in which the diagnostic test has been run and failed.
    The PCM will store conditions which were present when the DTC set as Freeze Frame and Fail Records data.

    CONDITIONS FOR CLEARING THE MIL/DTC

    The PCM will turn the MIL OFF during the third consecutive trip in which the diagnostic has been run and passed.
    The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
    The DTC can be cleared by using the scan tool Clear Info function or by disconnecting the PCM battery feed.

    DIAGNOSTIC AIDS
    Check for the following conditions:

    Open EGR ignition filter circuit.

    An open in the EGR ignition filter circuit will cause EGR Position Error to vary erratically while the EGR valve is operating. With the ignition ON, a test light should illuminate when connected between ground and the EGR ignition filter circuit at the PCM connector. If not, locate and repair the open in the EGR ignition filter circuit.

    Excessive deposits on EGR valve pintle or seat.

    Remove the EGR valve and check for deposits that may interfere with the EGR valve pintle extending completely or cause the pintle to stick.

    Poor connection or damaged harness. Inspect the wiring harness for damage. If the harness appears to be OK, observe the Actual EGR position display on the scan tool while moving connectors and wiring harnesses related to the EGR valve. A change in the display will indicate the location of the malfunction.

    Reviewing the Fail Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set

    TEST DESCRIPTION
    Number(s) below refer to the step number(s) on the Diagnostic Table:

    Verifies that the malfunction is present.

    The PCM contains a recirculation diode which filters the EGR ignition feed for the EGR valve. The recirculation diode is connected to the ignition filter (EGR ignition feed) circuit. If the ignition filter circuit is open, Actual EGR position may be erratic when compared to Desired EGR position. An open in the EGR ignition filter circuit will cause DTC P1406 to be set after an extended period of time.
    If DTC P1406 will only set under certain conditions, the malfunction may be intermittent; refer to DTC P1406 Diagnostic Aids. If an intermittent wiring problem is not present, check for a poor connection at the PCM or the EGR valve. If the connections are OK and DTC P1406 continues to set, replace the EGR valve.

    This vehicle is equipped with a PCM which utilizes an Electrically Erasable Programmable Read Only Memory (EEPROM). When the PCM is being replaced, the new PCM must be programmed.


    ------------------------------------------------------------------------------------------------------------------------------
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    Symptoms may include:
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    If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

    If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.


    Check it and keep us updated.

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    CONDITIONS FOR CLEARING THE MIL/DTC
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    icon_article_img.gif View & Print Options63_gc02lnbdy_6-445.png&width=568&height=248&displaytype=display&imgrotation=&links=459,216,534,227;Steps 1-3
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