1998 Saturn SL2 Service Light, code 1690, 1691

Discussion in 'Saturn S-series' started by KC, Jan 20, 2004.

  1. KC

    KC Guest

    My wife took her car to the dealer because the car was hard to start, but
    once she would slam
    the door or hood or jumped the battery the car started and ran fine. I
    checked the alternator and it
    was putting out 14.7 volts.

    The dealer told her that she needed a battery which was ok because it was
    the stock battery when
    we bought it, but then told her that the car would need $1100.00 in work to
    replace the computer and clear the service light because the computer was
    codes 1690 and 1691.

    My questions are:
    1. What do these codes mean and how are the usually fixed?

    2. I am a electrician, these problems look more like a short or bad
    connection should I start looking

    3. Am I being TOOK?
    KC, Jan 20, 2004
  2. I can't find anything about P1690, but P1691 is coolant temperature gauge
    circuit open or shorted. That's certainly nothing that would cause a
    no-start condition..

    Are you sure those are the correct codes?
    Robert Hancock, Jan 21, 2004
  3. ....if it turns out to be a bad computer (PCM), you might look into a used
    one from someone like http://www.6thplanetusedparts.com/ - I don't see
    the 1960 code either in my Chilton's.
    Jonnie Santos, Jan 21, 2004
  4. KC

    KC Guest

    The code are what the service manager wrote on the ticket, code 1690 and
    code 1691.

    KC, Jan 21, 2004
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