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Old 06-02-2014, 10:49 AM   #1
tgowers
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Check engine light

2006 2.0 duratech with 125,000 miles. I have a check engine light that came on yesterday. I took the car to autozone to see what code it was throwing... IT was about the water temp. The dummy gauge in the car showed pretty much dead center, maybe even a hair to the colder side. I just flushed and filled the coolant 3 weeks ago, but I couldn't find any info on the color of the coolant. The coolant that came out was green, so I went back with Prestone green. Are these supposed to use the GOLD, and could that be causing the thermostat to trip the check engine light?


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Old 06-02-2014, 12:39 PM   #2
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Ok, I see that this is being viewed, so lets modify my question. What color coolant are people using in their duractecs? Gold or Green
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Old 06-02-2014, 02:49 PM   #3
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I've seen both, I believe mine has gold in it right now though. I don't see a coolant change tripping the CEL on though. May have a bad coolant temp sensor, it doesn't know what kind of coolant you have only what the temp is. An improper mix of coolant/water could change the temp but you said your dummy gauge was reading correctly. what exactly is the code its throwing?
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Old 06-02-2014, 02:52 PM   #4
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The only other thing is it could have an air pocket around the sensor, or had an air pocket around the sensor, which would make it read higher since the air pocket would be hot. Make sure you have ALL the air out of your coolant system. I would probably bleed the coolant system and reset the CEL first to make sure it wasn't just an air pocket that threw it on. If you do that and the CEL comes back on then its probably a faulty sensor.
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Old 06-02-2014, 04:33 PM   #5
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Moved to "General Technical Chat".
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Old 06-02-2014, 06:28 PM   #6
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I run green coolant in everything, not a fan of the newer long life, organic acid, or other coolants. It takes a good repeat flushing to get out all the old coolant.

The green stuff is better in all aspects, except how long it lasts.
If a previous owner switched to green before I bought a used car, no worries at all. I would still flush and fill it though, don't know how old it is.
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Old 06-02-2014, 06:32 PM   #7
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Quote:
Originally Posted by tgowers View Post
2006 2.0 duratech with 125,000 miles. I have a check engine light that came on yesterday. I took the car to autozone to see what code it was throwing... IT was about the water temp. The dummy gauge in the car showed pretty much dead center, maybe even a hair to the colder side. I just flushed and filled the coolant 3 weeks ago, but I couldn't find any info on the color of the coolant. The coolant that came out was green, so I went back with Prestone green. Are these supposed to use the GOLD, and could that be causing the thermostat to trip the check engine light?
The type of coolant is unrelated to your problem.

The ford "gauge" is not a diagnostic tool. If fact, it isn't really a temp gauge, just a fancy three position idiot light: cold, normal, hot.

You can hold down the odometer button to get the true temp reading.
Then basic old fashioned diagnostics, is the fan coming on, is the thermostat opening, coolant level full....
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Old 06-03-2014, 10:08 AM   #8
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So if you hold down the odometer reset button it will show you the actual temp? How so?
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Old 06-03-2014, 02:28 PM   #9
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You can put your dash into engineer mode, you can see alot of things in an actual number form including DTC's when you put the dash into that mode. You actually don't even need a scan tool to read CEL codes for the focus. But yes if you put it into engineer mode it will show you alot more things alot more precisely than just the dummy gauge's
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Old 06-03-2014, 03:14 PM   #10
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You can't just leave me hanging like that... haha! I need some details on this engineer mode. Sounds pretty cool! Does anyone have any links, PDF's, videos, tutorials? And this is all available on my little 06 ZX3? I have the simple cluster with just the speedo, water temp, fuel gauge, and digital trip/odometer. Thanks for all the help! I like this little car, but I don't feel all the power that I am seeing these guys talk about, but I did just step down from a 5.4 Triton.
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