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ECM code 15

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Rob N. View Drop Down
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Post Options Post Options   Quote Rob N. Quote  Post ReplyReply Direct Link To This Post Topic: ECM code 15
    Posted: 23 July 2012 at 8:55pm
So while screaming home from Dave's on Sat, I got an eng chech loght after probably reving the eng too high. Oil pressure didn't change , no bellowing smoke or anything, but the idle swong from 500 tpo 1500 rpm and osolated there.. With my paperclip  tool, i got the error code 15. Coolent Sensor? I checked to make sure it was plugged in and wiggled the wires , tried it again and same code. Is the only cure to replace it?  
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Post Options Post Options   Quote Capt Fiero Quote  Post ReplyReply Direct Link To This Post Posted: 23 July 2012 at 11:19pm
Yep, a bad coolant sensor will play hell with the idle and fuel trim. I don't believe they are all too expensive, just ask Damian, he just put a new one in the 3.4. Its the sensor over near the coolant fill neck, mounted horizontally and had that crummy adapter on it.
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Post Options Post Options   Quote Rob N. Quote  Post ReplyReply Direct Link To This Post Posted: 24 July 2012 at 8:52am

I remember that one!   What is the sensor that 's just beside the coolent filler neck?  Are they the same pn in the  4 cyl? If it is , then I think I vave a spare one somewhere. 

 

 

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Post Options Post Options   Quote Capt Fiero Quote  Post ReplyReply Direct Link To This Post Posted: 24 July 2012 at 10:25am
As far as I know they are the same.
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Post Options Post Options   Quote Rob N. Quote  Post ReplyReply Direct Link To This Post Posted: 24 July 2012 at 3:28pm
I'll have a look at it tonight.  Why the two locations, or am I just realy confused?
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Post Options Post Options   Quote Capt Fiero Quote  Post ReplyReply Direct Link To This Post Posted: 24 July 2012 at 5:06pm

Your not confused, your just not informed,  there are actully 3.  One sensor on the side of the intake for the ECM temp, another sensor on top of the intake to turn the rad fan on and the 3rd which is in the head near the ignition coil that is for the gauge on the dash.

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Post Options Post Options   Quote Dr.Fiero Quote  Post ReplyReply Direct Link To This Post Posted: 24 July 2012 at 5:23pm
There's actually 4.  5 sort of!

ECM one.
Rad fan one.
Cold start one.
Gauge/light one (hence 4 or 5 depending on how you count!).

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Post Options Post Options   Quote Capt Fiero Quote  Post ReplyReply Direct Link To This Post Posted: 24 July 2012 at 5:44pm

I was under the impression the cold start was ECM controlled, and was fired depending on the temp the ECM temp sensor reported. 

Also the gauge/light is a single sensor just happens to have 2 wires off of it.  I know, I know, technically it does serve 2 functions, but still one physical device.

    If the C/S has its own temp pickup where is it?   

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Post Options Post Options   Quote Dr.Fiero Quote  Post ReplyReply Direct Link To This Post Posted: 24 July 2012 at 5:46pm
Right smack dab beside the rad fan switch.  Looks like a fuel injector connector on it.

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Post Options Post Options   Quote Rob N. Quote  Post ReplyReply Direct Link To This Post Posted: 24 July 2012 at 6:00pm

thanks guys... so the one that the ECM code is 15 is the ECM one , right.

do they all have the same pn?  I couldn't find one on your helpful lists.

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Post Options Post Options   Quote Capt Fiero Quote  Post ReplyReply Direct Link To This Post Posted: 24 July 2012 at 6:20pm

Well dang learn something new everyday.   However that is kinda cool, its another sensor that I can remove.  I removed the cold start valve years ago.  I did not know that, that was the C/S sensor or I would have removed it and the wiring for it a long time ago.

 

Rob all of them are different part numbers.  All with different plugs too. 

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Post Options Post Options   Quote Rob N. Quote  Post ReplyReply Direct Link To This Post Posted: 24 July 2012 at 7:23pm
oh $%#$@#!&*^%## goody....
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Post Options Post Options   Quote Capt Fiero Quote  Post ReplyReply Direct Link To This Post Posted: 24 July 2012 at 7:49pm

PM Sent

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Post Options Post Options   Quote Dawg Quote  Post ReplyReply Direct Link To This Post Posted: 25 July 2012 at 3:03am
Bought my ECM sensor from Lordco. Can't remember how much.
Possibly $50 retail.

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Post Options Post Options   Quote Rob N. Quote  Post ReplyReply Direct Link To This Post Posted: 27 July 2012 at 7:54am

Update : I actualy Found the correct unit in my pyle of misc sensors.   Not related , but I also changed my synchromesh Trans fluid. Big differance in the smoothness of the gear changes!

 

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Post Options Post Options   Quote Dawg Quote  Post ReplyReply Direct Link To This Post Posted: 27 July 2012 at 8:36am
Tried to phone you several times Rob. You got a teenage daughter or
something?.....:-)
You dream it up....I'll make it
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Post Options Post Options   Quote Rob N. Quote  Post ReplyReply Direct Link To This Post Posted: 27 July 2012 at 8:58am

 Hi Dawg...PM sent

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