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Thread: Need Help Error p0117

  1. #1

    Exclamation Need Help Error p0117 overheating

    Hello I was wondering if anyone has had a similar problem. I am trying to fix an overheating problem, on a 99.5 mk4 jetta 4cyl. I have changed the thermostat, then I went to autozone and used the VAG. I got an error code p0117 trouble shooting says: coolant temperature (ECT) circuit low

    Explanation

    BB open or short circuit condition

    Probable cause

    BB1 poor electrical conection
    BB2 faulty ECT sensor

    I have replaced the ECT sensor and no luck
    also the fan dosent come on while overheating but if you press the AC button on the dash the fans do work but not enough to cool the coolant any help would be appriciated im stumped.....
    Last edited by luckbox33; 07-21-2009 at 07:13 PM. Reason: title wasnt good enough

  2. #2
    We boostin'.They hatin'. amrrlz is on a distinguished road amrrlz's Avatar
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    Default Re: Need Help Error p0117 overheating

    have u checked all your fuses?

    why do u say that the car is overheating? temp gage, check engine light on or something else?

    is the coolant maxed out? Have u ever added coolant to your car? if yes, what type and when? what color is the coolant now?

  3. #3

    Default Re: Need Help Error p0117 overheating

    Definitly answer Apollo's questions.

    However, it does sound like wiring... Fans definitly should be on when overheating. The fans don't seem to be getting the message from the ECU saying ''turn on''.

  4. #4

    Default Re: Need Help Error p0117

    I have checked the fuses in the cabin and when I replaced the termo, I used G-12 coolant wich is pink. Also the temp gauge maxs out the dummy light comes on and as I posted I used a VAG to read the check engine light. The coolant resovour is boiling hot. I also posted the reading from the VAG I am trying to avoid the stearlership shop prices I can do most about any work if I can figure out the problem so any help would be greatly appriciated. Thanks GUYS AND GALS.

  5. #5

    Default Re: Need Help Error p0117

    Its gotta be the electrical connection going from the ECU to the fan, or your water pump is toast.

    Mileage? Timing belt and water pump replaced?

    BTW nobody but the stealer and select shops/people have a real VAG Com. You're using a basic scanner lol

  6. #6

    Default Re: Need Help Error p0117

    Could this possibly be the water pump? Would the fans not turn on if the hot water wasnt making it to the radiator? What about the heater core? Or the coolant fan relay? I also just read that there is a three prong coolant temp sensor conected to the radiator its self I think I will replace that one also to see if that kicks on my fans!

  7. #7

    Default Re: Need Help Error p0117

    Oh about the scanner my bad lmao, milage is only 66,000 my girlfriend just bought it 2 months ago, so im not sure about the replacment of the pump and timing chain but I would suspect no. where is the ECU located? should I be looking for melted wires or what lol.

  8. #8

    Default Re: Need Help Error p0117

    I have an 2001 Jetta VR6, she really liked mine, the one without problems. She decided to get one here self, kept trying to tell her to get the VR6 lol.

  9. #9

    Default Re: Need Help Error p0117

    lol gotcha. Cant trace wires from the ECU... Impossible lol. Check up with that three prong sensor, I've never heard of it? Hm.. www.germanautoparts.com has good prices on stuff like that.

    Water pump wouldn't affect fans turning on. The ECU gets its readings from the CTS (also known as ECT), but you replaced that for one with a green top, right Cause CTS is usually at fault.

  10. #10
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    Default Re: Need Help Error p0117

    hummm... 1.8 engine right? it really seems that your water pump is shot, but from your code, u would think that is an electrical problem...

    Your timing belt change is overdue, u gotta change it at 60 k and it is a BIG DEAL if u dont. When u do it, there is a kit sold everywhere that contains the belt, tensioner, water pump with METALLIC IMPELLER (pretty important detail) and thermostat. U dont need to thermostat anymore, so dont worry about that one.

    get it all done and see what happens. If u take to a shop, u are looking at $800-1000 parts + labor. I would not recommend doing one yourself unless you are a complete gear head lol

  11. #11

    Default Re: Need Help Error p0117

    Aww c'mon Apollo, tbelts aren't that hard lol. Just gotta be careful!

    And just FYI... I dunno if its still a problem, but ECS's kit had alot of tensioner failures.

  12. #12
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    Default Re: Need Help Error p0117

    Quote Originally Posted by Boost Addicted View Post
    Aww c'mon Apollo, tbelts aren't that hard lol. Just gotta be careful!

    And just FYI... I dunno if its still a problem, but ECS's kit had alot of tensioner failures.

    really? i always buy from them... thanks for the heads up

    the thing about timing belts is: u CANNOT afford a mistake. u cannot go back and fix it. If u do something wrong and turn your engine, you are done lol

    im all for doing the repair ourselves, but that one is just scary ha

  13. #13

    Default Re: Need Help Error p0117

    Well, very worst case scenario, if the belt breaks, you screw up your head and punch holes in your pistons. Its fixable... But very expensive.

  14. #14
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    Default Re: Need Help Error p0117

    Quote Originally Posted by Boost Addicted View Post
    Well, very worst case scenario, if the belt breaks, you screw up your head and punch holes in your pistons. Its fixable... But very expensive.


    precisely my point

  15. #15

    Default Re: Need Help Error p0117

    thanks Apollo!

    I was trying to avoid the whole water pump scenario but thanks for the encouragment lol. Anyway yea I feel competant enough to change the pump and chain. Should I first, try to change the sensor in the radiator and if see if that works.

  16. #16
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    Default Re: Need Help Error p0117

    no problem sir, glad to help lol

    good luck with everything and let us know the outcome

  17. #17

    Default Re: Need Help Error p0117

    Hmm! I just changed the radiator fan switch and the funny thing is; I warmed up the car untill the temp went well past the 190 mark, then I relased the radiator drain plug while hot. Then my fans kicked on. So my assumption now would be that the coolant is not circulating properly or else the fans would have came on when it hit 190. Time to start looking for a pump kit. lol. Also, I have read, these systems need to be vacumed when replacing the coolant. Would this cause the car to continue overheating or not circulating the coolant properly? Can any one walk me through vacume sealing the coolant system?

  18. #18
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    Default Re: Need Help Error p0117

    when i drained mine i did not do all that. I think what they are trying to avoid is coolant contamination.
    To do a coolant flush is not hard, just messy lol

    oh, make sure when u take your water pump apart that everything is in there. I say this cause a lot pumps plastic impeller fail, and that could clog up your line. If a part of the impeller is missing, find it haha, if you are not lucky THEN vacuuming wouldnt be a bad idea

  19. #19

    Default Re: Need Help Error p0117

    Yea I used to have this jeep and ripped that whole coolant system apart several times flushing, replacing, changing, and machining, even took the whole top half of the engine apart before I relized the block was cracked lol. But thanks for the tip on searching for missing fins prolly get the new pump kit in a couple of weeks works kinda slow and I will be sure to remember that. thanks for the help I will keep you posted

  20. #20
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    Default Re: Need Help Error p0117

    im gonna change up my thermostat this weekend too ha

    glad to help man, good luck

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