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Old 02-27-2014, 07:57 PM   #1
DieselRebel
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P0125 & white goo

In recent days, I've had my CEL on and it's given me a few codes. I think the main one is the 0125, but I'm still losing the battle with 0171.

There doesn't seem to be any symptoms that make something obvious. The engine warms up and doesn't act weird. Only thing I've noticed is the engine temp gauge doesn't quite seem to hit the dead middle. However, one thing that does have me concerned is the oil temp gauge. It barely reads at all now. I know it worked before.

To attempt to eliminate a step, I checked my coolant to see how it looked. The coolant itself is a pale green and hasn't been flushed or changed since I've owned it. However, another item having me concerned was the thick soft white goo I found clinging to the side of the coolant tank. Something tells me the goo may be causing the 0125 CEL.

Is there any tricks to checking items that could be faulty, or do I need a special scanner?


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Old 02-28-2014, 03:11 PM   #2
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Oh dear. Thick white goo means your head gasket is done, my friend. When the oil mixes with the coolant, is makes a goo or milkshake type of gunk that you can see in the tank. Your oil temp is low because it's mixing with coolant. This is bad.

Stop driving it until it's fixed or you risk more damage.
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Old 02-28-2014, 03:36 PM   #3
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While Leora83's comments should be taken seriously, if there was a blown head gasket and white foam in the coolant reservoir doesn't necessarily mean that you have a blown gasket. If other coolant types have been mixed it can create the very same white foam, have you looked at your oil? If there is a milkshake like substance in the valve cover area then it's safe to say you have a blown head gasket.

The P0125 is for insufficient coolant temperature, this can be caused by an air pocket in the system, a bad coolant temp sensor and usually cause the idle to stay around 1,000 rpm instead of the 750-800 they are supposed to be at.


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Old 02-28-2014, 05:32 PM   #4
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The coolant mix is a high possibility as I had a hose blow a small hole and I don't think a coolant change was done, just a top up. Also, the only time my car idles over 800 is when it's cold or not driven in a while. Lately though, I haven't noticed idle over 800

Sadly, prior to posting the original, I changed the oil. After a friend mentioned the oil could suggest something, I didn't find anything unusual in the used oil. And on a side note, the oil temp gauge hasn't responded since the new oil.
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Old 02-28-2014, 06:49 PM   #5
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Being a SVT, There is the off chance the Head Gasket is just fine and instead the oil cooler has cracked.
Actually I'm not sure if it's even possible, but it is something else and lower cost to fix.
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Old 03-04-2014, 02:18 PM   #6
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Update;

Went to Ford this morning to get the 0125 checked out. Luckily, all I need is a new T stat and a coolant flush.

However, they found other issues... I'll post a link to the new topic about it
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