wrench light?????what does it mean???
Senior User
Joined: Oct 2004
Posts: 422
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From: N. Carolina
My code is the "P012F" for the oil cooler efficiency .. I just can't come to terms with it. My oil cooler/egr cooler has less than 2k miles on it!!
Tuned
Joined: Aug 2008
Posts: 301
Likes: 3
Mine has less than 400 miles and it was running that way within 50 miles of changing it. I had replaced the thermostat, my ECT are now 190, but the EOT's went higher as well. I'm at a loss what could be causing the EOT's to still be higher? Cheezit, have you seen situations like this before?
Post Fiend
Joined: Jul 2005
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But if you are in doubt, method is below.... turn on headlight to drain capacitors.
Post Fiend
Joined: Oct 2009
Posts: 12,123
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From: N. Fort Worth, tx
there are very few t-stat failers as well, we just dont see it here. Ive had 2 turcks with p012f both varified oil cooler issues.
a t-stat fail sould cause ect to kind of bounce as it tries to open and close. a ect or eot sensor can be tested for bias when cold soaked overnight. they should read close to IAT2.
Do not compair it to IAT1 because the heater element in the maf sensor.
a t-stat fail sould cause ect to kind of bounce as it tries to open and close. a ect or eot sensor can be tested for bias when cold soaked overnight. they should read close to IAT2.
Do not compair it to IAT1 because the heater element in the maf sensor.
Post Fiend
Joined: Jul 2005
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cheez
I had a thermostat "failure" that did precisely that... caused the temp gauge to bounce up and down.
I basically "exercised" it a bit (hot temperatures, cool) and whatever it was that was causing it to stick cleared.
No part replaced.
I had a thermostat "failure" that did precisely that... caused the temp gauge to bounce up and down.
I basically "exercised" it a bit (hot temperatures, cool) and whatever it was that was causing it to stick cleared.
No part replaced.
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Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
a word of wisdom. the issues with the 6.4l radiators failing, egr cooler issues, and front cover cavatation has been linked to that concern. I think the $25 part may warrant replacment based soly on that alone.
Senior User
Joined: Oct 2004
Posts: 422
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From: N. Carolina
But even after the egr & oil cooler have recently been replaced? They re-clog that quick?
Post Fiend
Joined: Oct 2009
Posts: 12,123
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From: N. Fort Worth, tx
but you are focused on a time frame of days, and months nither of wich have any bearing. the focus should be on engine hours and milage. has the op check for things like atf, fuel, oil in the degas jug? was the engine really flushed with vc9? has the maintance been done at 5k or 200 hours as it should be? Did who ever that worked on the truck really replace the oil cooler? after all how do you think new oil cooler kits wind up on ebay? Most are not listed by the good tech fairy.
My .02
Lead Driver
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Tuned
Joined: Aug 2008
Posts: 301
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it is possible.
but you are focused on a time frame of days, and months nither of wich have any bearing. the focus should be on engine hours and milage. has the op check for things like atf, fuel, oil in the degas jug? was the engine really flushed with vc9? has the maintance been done at 5k or 200 hours as it should be? Did who ever that worked on the truck really replace the oil cooler? after all how do you think new oil cooler kits wind up on ebay? Most are not listed by the good tech fairy.
My .02
but you are focused on a time frame of days, and months nither of wich have any bearing. the focus should be on engine hours and milage. has the op check for things like atf, fuel, oil in the degas jug? was the engine really flushed with vc9? has the maintance been done at 5k or 200 hours as it should be? Did who ever that worked on the truck really replace the oil cooler? after all how do you think new oil cooler kits wind up on ebay? Most are not listed by the good tech fairy.
My .02
Post Fiend
Joined: Jul 2005
Posts: 6,127
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Hmmm... ok it is on my to do list with the coolant change.
Since that time it acted up (one of the first warm days after a very cold winter), it has behaved fine.
Not a single recurrence.