Question about 2000 Cadillac Catera

4 Answers

The check engine light is on, the ABS, and the traction control light are on. I went and had it put on the diagnostic machine at autozone, the following codes came up P1700 and U2108(twice) autozone could not tell what they were said dealer codes. Does anyone know what these codes are and what to do? At autozone I had the codes reset but the check engine light would come back on.

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  • oglesby_jack Oct 04, 2009

    Two Questions:

    1. What is causing the car to shut off after it runs for about 15 minutes it seems as if it shuts off once it warms up. I then wait and it starts back up about thirty minutes later.



    2. My low coolant light is on but the the tank is full, what is wrong?

  • oglesby_jack Oct 04, 2009

    It dies after a while sitting in drive way. How can I check the things you said? I just took it to autozone and none of that is coming up on scanner. Where to start first?

  • oglesby_jack Oct 04, 2009

    Thank-you , for being so helpful but where are the following located?

    1. choke controls

    2. engine idle sensor

    3. switch that controls starting

    Isn't there a way I can check fuel pressure to make sure filter is not blocked, isn't there a valve?

    note: when I first start the car it runs rough and takes some time to smooth out and then it runs smoothly and cuts off

  • golden girl Apr 19, 2013

    the U2108 is lost Communication with ABS/TSC Control System I have a list of codes

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The P1700 is just a request for the check engine light, and this is caused by the U2108. The U2108 is basically telling you that the Electronic Brake and Traction Control Module (EBTCM) is not communicating with the powertrain control module, or the transmission control module.
The very first thing we must do is verify that the fuses that power the ebtcm are not blown and that they are powered. At this point I would like you to verify that the fuse labeled ABS in the fuse block is not blown and that it is powered with the key in the on position.
I would also like you to verify that the fuse labeled V1 inthe power distribution box is not burnt and that this is powered also. After this we need to move to the ebtcm to verify that you have voltage at pins 15,17,18 and that you have a ground at 19 and 16.

This would verify that the ebtcm is getting the proper voltage supplies to operate. The end result of this may possibly be a faulty ebtcm, but at this point we really need to check these items prior.Feel free to contact me with any questions at this point! Thanks!

Posted on Oct 04, 2009

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  • INDIRA KUMAR
    INDIRA KUMAR Oct 04, 2009

    Answer for question No:1


    IT is not common but could be the filter inside the gas tank at the pick up tube. The injector rail could have some type of blockage in it that is causing the problem. not likely but could be. Throttle body sticking.


    The choke controls, at not functioning as it should. Engine idle sensor could be bad/weak. It may be responding to the hear of the engine. suggestion. run the vehicle at an idle to see if it occurs without the transmission being gear.


    The is a switch that controls starting, that could be effected by heat. It may be a good idea to have the computer system check to see if any engine fault codes are being recorded.


    I have analysed all the problems which may cause your car to die after driving for a while and again start after a while.

  • INDIRA KUMAR
    INDIRA KUMAR Oct 04, 2009

    Answer for question No:2




    There is a coolant temp. sensor that goes bad.

  • INDIRA KUMAR
    INDIRA KUMAR Oct 04, 2009

    Please rate and accept my solution if satisfied.

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Here are what the codes mean.

P1700....Malfunction Indicator Lamp requested by trans control module

This code (U2108) is a communications error with the ABS module. This goes hand-in-hand with the TC and ABS lights and code P0500. The VSS is wired to the ABS first, then carries over to the ECU and speedometer. I found this out the hard way with a buddy's Catera. When the ABS module has communications errors, the speedometer loses signal from the Vehicle Speed Sensor (VSS).

Good luck

Posted on Oct 04, 2009

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  • Cadillac Master
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The "Check engine" "ABS" and "Stabilty traction control" lights are fed by the same "type" of computer chips that store information at any given time caused by a speedbump, a flat tire, etc. etc. The diagnostics at Autozone will read the codes but it does not dismiss them, this has to be done by an authorized dealer. If you are not experincing any changes to the operation of the engine, traction, or the brakes, than you only have to get these codes removed from their respective system computers. Thank you, Dana

Posted on Oct 04, 2009

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Most of the abs ecu tcu proplems cuesd by low A OR NON SUTABLE BATTERRY
if u have the abs and the tc lights no speedo u may check the wheel sensors first of all ,U2108 in most cases reqest to replace anew (EBTCM) IF U GOING DRIVE WITH U2108 ERROR U WELL HAVE ANEW ERROR CODE P1700 AND WELL FORCE PROPLEMS WITH THE TCU , AFTER REPLACING ANEW EBTCM YOU MUST REMOVE ALL THE ERRORS CODES FROME THE MEMORY

Posted on Oct 21, 2011

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