2005 STS No Crank/No Start
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Cadillac STS Forum - 2005 through 2012 Discussion, 2005 STS No Crank/No Start in Past Cadillac Vehicle Discussion; got a 2005 sts with northstar engine I drove it home from work everything worked fine next morning went to ...
  1. #1
    mikera is offline Cadillac Owners Member
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    2005 STS No Crank/No Start

    got a 2005 sts with northstar engine I drove it home from work everything worked fine next morning went to start it hit the brakes pushed the button all the dashboard lights turned off everything then 15 seconds later it came back on when I tried to scan it for codes there is no communication with the pcm but my scanner can communicate with the tcm and all the other moduals starter is not bad I jumped it from the relay box and it cranks the engine but still no start any one else have this kind of problem

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  3. #2
    C&C's Avatar
    C&C
    C&C is offline Cadillac Owners Connoisseur
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    Re: 2005 STS No Crank/No Start

    Could be lots of things, but with all start problems, first step is to verify a good battery and battery terminal attachments (for tightness).

  4. #3
    mikera is offline Cadillac Owners Member
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    Re: 2005 STS No Crank/No Start

    battery is brand new from dealer terminals are on good and tight

  5. #4
    Guy.Seminerio is online now Cadillac Owners Connoisseur
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    Re: 2005 STS No Crank/No Start

    Don't rule out the battery. Have it tested. I've experienced personally/heard stories of defective batteries many times. Has the car been driven since the battery was replaced?

  6. #5
    JT_alpha is offline Cadillac Owners Member
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    Re: 2005 STS No Crank/No Start

    ive had this problem before when i tried to scan for codes too try disconecting the battery for about a minute and connect back this will reset the ecu and then try again it should crank

  7. #6
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
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    Re: 2005 STS No Crank/No Start

    Facing that symptom, I would also first suspect the battery.

  8. #7
    Roger O'Dell is offline Cadillac Owners Member
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    Re: 2005 STS No Crank/No Start

    I had a similar problem last week, stopped for lunch, got back in the car, starter clicked but didn't turn the eng over. As time went on I noticed a msg "THEFT ATTEMPT START DEACTIVATED" or something. But it appeared to me to be a weak battery,however the acc worked fine radio etc. I called the auto club to replace the Battery. They came out and did a test, said battery was ok. I had it towed, was going to the dealer but by the time I got in the Area they were closed. I took it home jumped the Batt next morning, took it to the dealer, they tested and said batt had a weak cell. I had them replace the Batt in my 2005 sts 4.6 as well as the key thob Batt. Worked ok this week. Roger

  9. #8
    keith721 is offline Cadillac Owners Member
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    Re: 2005 STS No Crank/No Start

    I've purchased new batteries before that had defective cells and another that was shorted dead and refused to charge at all. Just because it's new doesn't mean it's not bad in some way.

  10. #9
    TimmyC is offline Cadillac Owners Connoisseur
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    Re: 2005 STS No Crank/No Start

    Did this get resolved? Non communication problems are usually power to the module in question or data wire continuity.

  11. #10
    daddy_o's Avatar
    daddy_o is offline Cadillac Owners Fanatic
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    Re: 2005 STS No Crank/No Start

    Quote Originally Posted by TimmyC View Post
    Did this get resolved? Non communication problems are usually power to the module in question or data wire continuity.
    I too, ask, did it get resolved.
    Folks, especially new folks, don't abandon us here just because the problem is fixed,
    This is a site to help and solve, every time you post with an idea or solution, it helps all of us.

    These cars can be like girls, always posing Q's with no solutions.

    (with apologies to super moderator Jesda)

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