Saab Throttle Body Problem?
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Thread: Saab Throttle Body Problem?

  1. #1
    Regular Saab Guy
    Join Date
    May 2006
    Location
    Warrington, Cheshire
    Posts
    94

    Saab Throttle Body Problem?

    Hi, I have a problem with my 2002 Saab 9-3. This morning the TCS system light came on, and the light shaped as an engine came on indicating there was a problem. When I came to a stop, my idle revs had gone up to about 1500 revs, and not the usual 800/900.

    I called out the AA, and he ran a diagnostic, which came up with a fault code of P1230. He made note "Fuel volume reg/Control" and reset the fault with his computer. It quickly returned after a short drive again. I have a friend who knows somone who works for Saab, and he says it sounds like a throttle body problem from what I described.

    Apparently, the car has gone into 'limp home' mode, and power has been reduced quite a bit, and also now have no cruise control or traction control. When you turn on the ignition, you can hear 7 or 8 tick tick tick sounds from the engine.

    Has anyone experienced this before, or does it sound like a throttle body replacement? Any answers gratefully received!! It looks like an (expensive) trip to my saab main dealer? How much does one of these replacements cost?

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  3. #2
    Wastegate
    Join Date
    Sep 2000
    Location
    Mulbarton, was Deepest Mid Norfolk
    Posts
    8,872

    Re: Saab Throttle Body Problem?

    P1230

    Throttle Position Sensor 1 and 2 Circuit. Sum Out of Range.
    Fault symptoms
    • CHECK ENGINE.
    • Idling speed incorrect.
    • Cruise control not working.

    On-Board Diagnostics
    Type of diagnosis:
    - Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.

    Enable criteria:
    - Ignition in ON position.

    Fault criteria:
    - The sum of voltages from throttle position sensors 1 and 2 exceeds 5.70V for more than 760ms or is below 4.59V for more than 320ms.

    Dependents:
    - None.

    System reaction to a fault:
    - Throttle control goes into limp-home mode. The limp-home solenoid will be activated 5 times in succession each time the ignition is turned on until the fault has been rectified and the trouble codes cleared.

    OK report:
    - Accelerator pedal has been depressed at some time and then fully released. 120 s has expired since then without fault criteria being fulfilled.

    Fault handling:
    - CHECK ENGINE goes on immediately and can be turned off only by clearing the trouble codes.

    Diagnostic help
    • Fault criteria have been changed in the latest software version. The diagnosis in the latest software version has been made more robust. In case of P1230, check that the control module is NOT programmed with an earlier software version, refer to the software table.
    • If the control module is programmed with an earlier software version, it must be SPS programmed, DTCs must be cleared and the throttle's limp-home mechanism must be reset. The throttle body must not be changed. Only when the fault recurs after a road test can the wiring harness or throttle body be considered as suspect.
    • The wiring harness or throttle body can be considered as suspect if the control module is programmed with the latest software version.

    Fault diagnosis concerns electrical fault in connecting leads or in one of the sensors.

    Functions in the diagnostic tool related to the fault:
    • Throttle Position Sensor 1, unit V.
    • Throttle Position Sensor 2, unit V.

  4. #3
    Regular Saab Guy
    Join Date
    May 2006
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    Warrington, Cheshire
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    94

    Re: Saab Throttle Body Problem?

    Thanks for that reply scaero. Does this mean it looks likely that its not actually the entire throttle body that's gone bad?
    It's just I've read a few posts elsewhere, and it now appears that the throtle body failing is quite common on saabs?

  5. #4
    Regular Saab Guy
    Join Date
    May 2006
    Location
    Warrington, Cheshire
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    94

    Re: Saab Throttle Body Problem?

    I have now had the throttle body re-set. The problem was exactly as described above. The garage did not want to replace the throttle body unless it fails again, as sometimes a simple re-set is enough to cure the problem. They said they had re-set an 'arm' on the body itself, and another report stated that it was 'binding'. I am far from a mechanic, and this made only a little sense to me. Sorry if this should be totally obvious to me!

    I just wonder now, does anyone know what the chances of my problem coming back again are and me having to replace the throttle body? I guess I need to start saving the pennies just incase....

    Any advice much appreciated.

  6. #5
    Saab Newbie
    Join Date
    Nov 2011
    Posts
    3

    Re: Saab Throttle Body Problem?

    Any updates on throttle body sensor position code problem? Have 2000 95 Aero that 2 yrs ago started stalling at idle with limp home activated, code DTC P1230 TPS 1 & 2 outof range. Changed breather hose and nipple. Happened again, this time also stalling at highway speeds, code DTC P1231, P1261 throttle mechanical faults. Decarb/throttle body service done includng inductn systm and clean throttle plate. Again, lost all acceleration at highway speed, limp home activated w/ CEL & TCSOFF lights activated, stalling at idle with AC load, code per dealer, 'throttle position sensor.' Replaced entire throttle body unit $865. 2 days of highwy driving and same thing happened. I could feel acceleration affected by something besides my pedal, looked down and CEL and TCSOFF lights activated, but this time I did not loose all accelertn until a short time later. Please help--we still like driving this car, but are just about ready to give up and sell.

  7. #6

    Re: Saab Throttle Body Problem?

    Quote Originally Posted by kcck95 View Post
    Any updates on throttle body sensor position code problem? Have 2000 95 Aero that 2 yrs ago started stalling at idle with limp home activated, code DTC P1230 TPS 1 & 2 outof range. Changed breather hose and nipple. Happened again, this time also stalling at highway speeds, code DTC P1231, P1261 throttle mechanical faults. Decarb/throttle body service done includng inductn systm and clean throttle plate. Again, lost all acceleration at highway speed, limp home activated w/ CEL & TCSOFF lights activated, stalling at idle with AC load, code per dealer, 'throttle position sensor.' Replaced entire throttle body unit $865. 2 days of highwy driving and same thing happened. I could feel acceleration affected by something besides my pedal, looked down and CEL and TCSOFF lights activated, but this time I did not loose all accelertn until a short time later. Please help--we still like driving this car, but are just about ready to give up and sell.

    Can you please tell me if you found a solution to this problem ?

  8. #7

    Re: Saab Throttle Body Problem?

    Waiting at the traffic lights this AM when my saab 9-5 Aero HOT '02 decides to just cut out. The engine would start again but would not stay running and kept turning itself off as soon as i let off the revs.
    I called the recovery truck who reset the error code which was P1230 which made the car drivable in limp home mode. I have taken it to a garage who have quoted me £878 for a new "throttle control unit" which needs to be ordered in as its a specialist part.
    No idea if im being ripped off or not here as you put trust in these guys.
    Any advice on this would be greatly recieved as im really struggling to afford that!!!!

  9. #8
    Saab Anorak
    Join Date
    Apr 2004
    Location
    Bangkok, Thailand
    Posts
    735

    Re: Saab Throttle Body Problem?

    Go to the website swedishwrench<dot>com. Click on 'Feature Articles, then scroll down to 'Saab T7 limp home reset'. This will give you an idea on what may need to be done.

  10. #9
    Saab Junior
    Join Date
    Feb 2012
    Location
    Schweinfurt, Germany
    Posts
    26

    Re: Saab Throttle Body Problem?

    i have had this same problem and it will come back its just a matter of time. Cleaning my throttle body cleared my fault for awhile. I was throwing another code which was to replace my DIC. I got lucky and purchased one at a junk yard for $30 new they are about $300. I also read that the throttle bodies are also a common prob and picked that up for about $40. Solution: Take this time to find the best deal on a throttle body and DIC. FYI i have a SAAB 93 SE 2.0T

  11. #10

    Re: Saab Throttle Body Problem?

    Hi, I have a SAAB 95. Just under 4 years old, 66,000 on the clock. Running great no hassle. Then in for the regular service. Told no problems. Three weeks later driving home from work and felt it was over revving at traffic lights and running slightly rough on freeway. Took it back to the service dealership which SAAB have recently sold to a KIA tradership. There were no warning messages displayed at all on the console. The dealership are saying its a fuel system throttle body fault coding, requires new throttle body $1342.00 fitted. On driving it to the yard, running ok. Any thoughts, seems a bit extreme. Thanks.

  12. #11
    Saab Nut
    Join Date
    Dec 2003
    Location
    Peterborough,Cambs,UK
    Posts
    324

    Re: Saab Throttle Body Problem?

    I have two 9-5's both of which have had this common problem.
    There is plently of info on the net regarding the fault - the earlier throttle bodies had big problems with the internal wiring breaking down and giving shorts.
    The throttle body is easily replaced and you can buy refurbed units at relatively low cost.
    I believe the wiring is seperated and then fixed with hot glue to re-insulate etc.

    I have had a faulty one apart in the past and there were cracks all over the wiring insulation.

    Its a relatively easy job to do imho........

    http://photo.platonoff.com/Auto/2004...throttle_body/

  13. #12

    Re: Saab Throttle Body Problem?

    Hi, that's great . Thanks for the reply.

  14. #13
    Saab Nut
    Join Date
    Dec 2003
    Location
    Peterborough,Cambs,UK
    Posts
    324

    Re: Saab Throttle Body Problem?

    Your welcome...I see BBA-Reman are offering exchange unit for nearly a tenth of your quoted price in the usa

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