Inspection failure

Discussion in 'General Motoring' started by Eric G., Aug 27, 2009.

  1. Eric G.

    Eric G. Guest

    Purchased my 2006 Sonata V6 in September, 2005. They give you 4 years on a
    new vehicle here in NJ. So, today I go over to get the inspection done
    since I have some time. I had to sit in line for just over 30 minutes.

    I get in the facility, get out of the car, and I see the CEL come on. I
    keep my mouth shut knowing they will fail me anyway. Guy gets in the car
    and tries to rev the engine....nothing just idles. He puts
    it in gear and it drives fine. Back in park and it won't rev up.

    Now I am figuring this is some computer screw up as it has never happened
    to me before. I suggest turning the engine off and then on again. He does
    it. Engine now revs fine and CEL went off.

    But....when they hook up the OBDII reader, the engine still tossed two
    codes that they had to fail me for.

    P1295 and P0638.

    Now my car is still under warranty, so I am probably going to let the
    dealer have a go at this one, but I would really like to know if anyone has
    seen this before after a long idling period. And Hyudaitech, maybe you can
    interpret those codes for me?


    BTW, I just turned 50,000 miles inspection report shows
    50,038 to be exact. The emission warranty is 5/60 here I think.
    Eric G., Aug 27, 2009
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  2. Eric G.

    Partner Guest

    This is from the Hmaservice website.

    2006 > G 3.3 DOHC > P0638 Throttle Actuator Control Range/Performance
    Checking output signals from TPS. under detecting condition, if the
    difference between real and target throttle position is above the specified
    value, PCM sets P0638. MIL(Malfunction Indication Lamp) turns on when the
    malfunction lasts till 1 driving cycle.

    2006 > G 3.3 DOHC > P1295 ETC (Electronic Throttle Control) System
    Malfunction - Power Management
    If power management mode is recognized under detecting condition, PCM sets
    P1295. And MIL(Malfunction Indication Lamp) turns on.

    The Electronic Throttle Control(ETC) system is made of the components
    throttle body, Throttle Position Sensor(TPS)1&2 and Accelerator Position
    Sensor(APS) 1&2. The throttle body contains the actuator, the throttle plate
    and the throttle position sensor (potentiometer), which are integrated in
    one housing. The actuator consists of a DC motor with a two-stage gear. The
    opening angle of the throttle valve is detected by the throttle position
    sensor which is mounted on the throttle body. And it provides feedback to
    the PCM to control the throttle motor in order to control the throttle valve
    opening angle properly in response to the driving condition
    Partner, Aug 27, 2009
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  3. Eric G.

    Eric G. Guest

    Thanks! So they both relate to the throttle in one way or another.
    This is very interesting considering the throttle problem I mentioned.
    First time and only time it has ever happened thus far.

    And also amazingly, the CEL went off after driving the car a few times.
    I'm wondering if this was just a fluke one time thing. My appt. at the
    dealer is 9/1, but I may attempt to take it back for re-inspection
    before then. It doesn't hurt you here if you fail twice.

    Eric G., Aug 27, 2009
  4. Eric G.

    Partner Guest

    Be careful that you don't take it back in for inspection too soon after the
    dealer (or anyone) clears the codes, a status is set and doesn't clear
    until a number of drive cycles have been driven. This status will also
    cause a rejection. This is to stop people from clearing the codes and going
    straight to the inspection before the error can recur.
    Are you saying that he failed you even though the CEL was not on, just
    because he found the codes set?
    Partner, Aug 28, 2009
  5. Eric G.

    Eric G. Guest

    No, sorry. I know what I wrote was a little confusing. The CEL was on
    initially, then turned off, then apparently was on again. It was still on
    when I took possesion of the car again, but turned off after a little bit
    of driving. And I was warned by the dealer about the drive cycle
    requirement. I am headed out now to the inspection station. All they can
    do is fail me again if need be and I already have a dealer appointment next

    Thanks again,
    Eric G., Aug 28, 2009
  6. Eric G.

    Eric G. Guest

    The inspection station was too jammed yesterday, so I went this morning
    after a midnight shift and passed without an issue. I'm probably still
    going to let the dealer have a look to see if maybe it was something more
    than a fluke.

    Eric G., Aug 29, 2009
  7. Eric G.

    hyundaitech Guest

    The plain English translation of all this is that P0638 set and the
    check engine lamp came on because the PCM perceived it was unable to
    move the throttle plate to the desired position. P1295 sets when a
    power management mode is entered. In this case, because the PCM
    detected a problem with the throttle body, it limited engine rpm to
    prevent uncontrolled acceleration. There's a technical service
    bulletin regarding this problem. It instructs the technician to
    replace the throttle position sensor and reprogram the PCM. If you
    haven't done this already, have it done soon. The car isn't very
    driveable when the problem occurs.
    hyundaitech, Sep 7, 2009
  8. Eric G.

    Eric G. Guest

    Thanks, HT. Haven't seen this TSB. Will look and get it applied soon.

    Eric G., Sep 7, 2009
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