Code P2601
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Cadillac STS Forum - 2005 through 2012 Discussion, Code P2601 in Past Cadillac Vehicle Discussion; 2 days ago i changed my oil, and also had power steering fluid all over everything from a couple weeks ...
  1. #1
    Ghost Deany is offline Cadillac Owners Enthusiast
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    Code P2601

    2 days ago i changed my oil, and also had power steering fluid all over everything from a couple weeks ago, so i hosed it off of everything and removed the 2 plastic covers on the bottom of the car that cover the oil pan etc. and hosed everything clean. Yesterday after i parked in the garage, i went back into the car to move it outside for something and noticed my CEL was on, so i hooked up my scanner and it came up with P2601, something about the coolant circuit pump. I noticed then that the temperature was reaching up to over heating. I cleared the code off, and the temp was still high, so i parked it in the garage until today. Start it up, made a loud weird noise that sounds like the DI engine starting up but some weird clicking. then everything was running fine, did a restart no noise. Took it for a drive and the lights still off and the operating temperature is normal. Any ideas? 2011 STS with 34k miles. Maybe something got wet? Also, does everyone air conditioning get cold while driving, but then while parked and idling get warmer? I notice when driving the AC is fine and ice cold, but if i park and sit in park running, the air will get significantly warmer

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  3. #2
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
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    Re: Code P2601

    It should be under warranty. Just take it to the dealer for cooling system & A/C faults.

  4. #3
    Ghost Deany is offline Cadillac Owners Enthusiast
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    Re: Code P2601

    Yea just wondering what the issue was. I already have an appt. for monday morning for the steering wheel zipper whine noise but now that appears to have gone away and only have the CEL on

  5. #4
    Subsailor613's Avatar
    Subsailor613 is offline Cadillac Owners Enthusiast
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    Cool Re: Code P2601

    P2601 Aux coolant pump performance

    -Faulty Aux coolant Pump relay
    -Blocked Pump control Pasage
    -Faulty Aux coolant Pump
    -Aux Coolant Pump harness is open or shorted
    -Aux Coolant Pump circuit Poor Electrical connection

    Happy Motoring

  6. #5
    Cadillac Cust Svc's Avatar
    Cadillac Cust Svc is online now Cadillac Customer Service
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    Re: Code P2601

    Quote Originally Posted by Ghost Deany View Post
    2 days ago i changed my oil, and also had power steering fluid all over everything from a couple weeks ago, so i hosed it off of everything and removed the 2 plastic covers on the bottom of the car that cover the oil pan etc. and hosed everything clean. Yesterday after i parked in the garage, i went back into the car to move it outside for something and noticed my CEL was on, so i hooked up my scanner and it came up with P2601, something about the coolant circuit pump. I noticed then that the temperature was reaching up to over heating. I cleared the code off, and the temp was still high, so i parked it in the garage until today. Start it up, made a loud weird noise that sounds like the DI engine starting up but some weird clicking. then everything was running fine, did a restart no noise. Took it for a drive and the lights still off and the operating temperature is normal. Any ideas? 2011 STS with 34k miles. Maybe something got wet? Also, does everyone air conditioning get cold while driving, but then while parked and idling get warmer? I notice when driving the AC is fine and ice cold, but if i park and sit in park running, the air will get significantly warmer
    Hello Ghost Deany,

    I am sorry you are experiencing vehicle issues. That is good you have an appointment with your local dealership on Monday. That is what I was going to recommend. The dealership will be able to properly diagnose your issues. When you bring your vehicle in, make sure to tell them everything that has concerned you with your vehicle. I will reach out to you early this week to check on your dealership visit. If you have other questions or concerns please let us know. Thanks, have a great night.

    Sincerely,
    Laura M.
    Cadillac Customer Service

  7. #6
    chazglenn3's Avatar
    chazglenn3 is offline Cadillac Owners Connoisseur
    Automobile(s): 2005 White Diamond STS N* 1SF RWD ACC/HUD
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    Re: Code P2601

    Weren't the aux coolant pumps part of the 1SG package? Do the 2011 cars even have the 1SG package available?

  8. #7
    Ghost Deany is offline Cadillac Owners Enthusiast
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    Thread Starter
    I think i have the 1sb? Def dont have 1sg. I have a RWD w sunroof, nav, bose surround 15 spkr. The couple things i can think of off hand that i dont have are HUD, Magneride and a few other options im sure.

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