Help!!!!!!!! still have a code 15, fan running constantly
Thread Starter
Le Mans Master
Joined: Jun 2001
Posts: 6,694
Likes: 3
From: Less Talk, More WOT | Houston TX
Help!!!!!!!! still have a code 15, fan running constantly
I recently replaced my water pump and its turning into a nightmare.. after i flushed the system i changed the water pump and now i have a service engine light, and i was told to let the engine run to normal operating temp and when the thermostat opens i could fill it all the way up and the code would go away, but now the stupid fan is running constantly and the coolant will not get to 195 so the stat will not open....how can i fix this or is there some other reason im gettting this code.. :confused:
thanks
thanks
Le Mans Master
Joined: Dec 1999
Posts: 8,540
Likes: 1
From: And on the fifth day, subpoenas were served to Obama senior staff
Re: Help!!!!!!!! still have a code 15, fan running constantly (C4Fetish)
You have headlight flashers?
Code 15 means the coolant temp sensor under the Throttle body is providing an impossilby low reading unless you are in Antactica in the winter. This is generally caused by being disconnected or a broken wire to the sensor or a broken sensor.
You can test the wireing by removing the sensor connector and shorting the two pins together. First clear all codes by removing the negative battery cable for a minute, then do test. You should now get code 14. If still code 15 then the wires, connector, ecm is where to look. If you get 14 and no 15 (after clearing) then very likely sensor is bad.
Fan being on all the time is another issue. Does the fan come on with just the key on, no start?
Check sensor first, then you can worry about the fan. One thing at a time.
Code 15 means the coolant temp sensor under the Throttle body is providing an impossilby low reading unless you are in Antactica in the winter. This is generally caused by being disconnected or a broken wire to the sensor or a broken sensor.
You can test the wireing by removing the sensor connector and shorting the two pins together. First clear all codes by removing the negative battery cable for a minute, then do test. You should now get code 14. If still code 15 then the wires, connector, ecm is where to look. If you get 14 and no 15 (after clearing) then very likely sensor is bad.
Fan being on all the time is another issue. Does the fan come on with just the key on, no start?
Check sensor first, then you can worry about the fan. One thing at a time.
Thread Starter
Le Mans Master
Joined: Jun 2001
Posts: 6,694
Likes: 3
From: Less Talk, More WOT | Houston TX
Re: Help!!!!!!!! still have a code 15, fan running constantly (PeteL)
You have headlight flashers?
Code 15 means the coolant temp sensor under the Throttle body is providing an impossilby low reading unless you are in Antactica in the winter.
I thought the coolant temperature sensor was on the radiator.........also, i did notice a two pronged connector near the throttle body disconnected, but i cant seem to find where it goes...could this be the cause of my code 15?
thanks
[Modified by C4Fetish, 4:09 PM 4/29/2002]
Melting Slicks
Joined: Jan 2000
Posts: 3,418
Likes: 1
From: NW Chicago Suburbs
Re: Help!!!!!!!! still have a code 15, fan running constantly (PeteL)
Fan being on all the time is another issue. Does the fan come on with just the key on, no start?
Check sensor first, then you can worry about the fan. One thing at a time.
Check sensor first, then you can worry about the fan. One thing at a time.
Eric
Le Mans Master
Joined: Dec 1999
Posts: 8,540
Likes: 1
From: And on the fifth day, subpoenas were served to Obama senior staff
Re: Help!!!!!!!! still have a code 15, fan running constantly (C4Fetish)
would this affect my digidash coolant temp display? it seems to be normal there......
I thought the coolant temperature sensor was on the radiator.........also, i did notice a two pronged connector near the throttle body disconnected, but i cant seem to find where it goes...could this be the cause of my code 15?
I thought the coolant temperature sensor was on the radiator.........also, i did notice a two pronged connector near the throttle body disconnected, but i cant seem to find where it goes...could this be the cause of my code 15?
The sensor on the radiator is a low coolant sensor.
Yes, that two pronged plug is your problem. Go in with a flashlight and look in the block below the throttle body and you will find a sensor that needs a plug!
Thread Starter
Le Mans Master
Joined: Jun 2001
Posts: 6,694
Likes: 3
From: Less Talk, More WOT | Houston TX
Re: Help!!!!!!!! still have a code 15, fan running constantly (PeteL)
:lol: :lol:
thanks for the help!!!!!
all this time i was mad i screwed up the water pump install and all it was was a little plug....
boy i feel like a :troll for this one!!!
[Modified by C4Fetish, 4:20 PM 4/29/2002]
thanks for the help!!!!!
all this time i was mad i screwed up the water pump install and all it was was a little plug....
boy i feel like a :troll for this one!!!
[Modified by C4Fetish, 4:20 PM 4/29/2002]
Le Mans Master
Joined: Dec 1999
Posts: 8,540
Likes: 1
From: And on the fifth day, subpoenas were served to Obama senior staff
Re: Help!!!!!!!! still have a code 15, fan running constantly (C4Fetish)
I always forget to plug the MAF back in, but GM put a little red light on the dash that comes on to remind me. :D
