2018 2.7 broken down...
Senior Member
Joined: Mar 2008
Posts: 520
Likes: 82
From: Braselton, GA
I once had a Ford Ranger that did this a few times. It didn't go into limp mode so it just showed max temp. They ended up finding a shorted wire that was mis-routed at the factory. In my case, it showed max temp at startup so I knew it couldn't have overheated.
I don't think I could accept their explanation to you though.
I don't think I could accept their explanation to you though.
Size Matters
Joined: Aug 2015
Posts: 5,958
Likes: 3,402
So they gave me the truck back, two codes had came up. It was EL1 and EL15 I think? They were both temp and overheat related, and they drove at least 100 miles since I dropped it off with no more code.
i don’t know, they left the file open and I’m supposed to test drive it now to try and figure it out I guess. If the event happens again I’ll have to get it towed back but at this point I’d rather bring it to another dealership if that’s the case. 3 days with the truck and all I got was a cleared CEL, which I could have done myself Sunday morning when it happened.
The advisor seemed confident that it was just a glitch but that sounds like BS to me. I’m gonna have to do some research as to the locations of sensors and wires leading to sensors to check it all myself.
does anyone have any input as to the locations of the temperature sensors?
i don’t know, they left the file open and I’m supposed to test drive it now to try and figure it out I guess. If the event happens again I’ll have to get it towed back but at this point I’d rather bring it to another dealership if that’s the case. 3 days with the truck and all I got was a cleared CEL, which I could have done myself Sunday morning when it happened.
The advisor seemed confident that it was just a glitch but that sounds like BS to me. I’m gonna have to do some research as to the locations of sensors and wires leading to sensors to check it all myself.
does anyone have any input as to the locations of the temperature sensors?
Senior Member
Joined: Jun 2017
Posts: 2,336
Likes: 451
From: Memphis TN
I would put even money on the coolant temp sensor faulted. Now that's either the sensor itself (they are fairly reliability) or the wires to the sensors.
Since the gage spiked up - that's what I would put my money on sight unseen and without my nifty computer reader.
When coolant temp get to ______ the computer goes to protection mode and sets the CEL. That value varies on the engine and parameters but I want to say it's often just before the red spot on the temp gage. This is read by the ECU first and fed to your dash by the CAN buss. So note that the gage isn't directly to the sensor - the computer reads it first.
Does the paperwork say they replaced the sensor? I wouldn't worry to much about it as premature failures sadly do occur in all sorts of things.
Also yes that shake and stutter is limp home mode - it kills spark advance - mods valve timing - skips fires and a number of other things to try to protect the engine but keep it running.
Since the gage spiked up - that's what I would put my money on sight unseen and without my nifty computer reader.
When coolant temp get to ______ the computer goes to protection mode and sets the CEL. That value varies on the engine and parameters but I want to say it's often just before the red spot on the temp gage. This is read by the ECU first and fed to your dash by the CAN buss. So note that the gage isn't directly to the sensor - the computer reads it first.
Does the paperwork say they replaced the sensor? I wouldn't worry to much about it as premature failures sadly do occur in all sorts of things.
Also yes that shake and stutter is limp home mode - it kills spark advance - mods valve timing - skips fires and a number of other things to try to protect the engine but keep it running.
Thread Starter
Member
Joined: Dec 2017
Posts: 62
Likes: 13
I would put even money on the coolant temp sensor faulted. Now that's either the sensor itself (they are fairly reliability) or the wires to the sensors.
Since the gage spiked up - that's what I would put my money on sight unseen and without my nifty computer reader.
When coolant temp get to ______ the computer goes to protection mode and sets the CEL. That value varies on the engine and parameters but I want to say it's often just before the red spot on the temp gage. This is read by the ECU first and fed to your dash by the CAN buss. So note that the gage isn't directly to the sensor - the computer reads it first.
Does the paperwork say they replaced the sensor? I wouldn't worry to much about it as premature failures sadly do occur in all sorts of things.
Also yes that shake and stutter is limp home mode - it kills spark advance - mods valve timing - skips fires and a number of other things to try to protect the engine but keep it running.
Since the gage spiked up - that's what I would put my money on sight unseen and without my nifty computer reader.
When coolant temp get to ______ the computer goes to protection mode and sets the CEL. That value varies on the engine and parameters but I want to say it's often just before the red spot on the temp gage. This is read by the ECU first and fed to your dash by the CAN buss. So note that the gage isn't directly to the sensor - the computer reads it first.
Does the paperwork say they replaced the sensor? I wouldn't worry to much about it as premature failures sadly do occur in all sorts of things.
Also yes that shake and stutter is limp home mode - it kills spark advance - mods valve timing - skips fires and a number of other things to try to protect the engine but keep it running.
This stuff does occur and with new vehicles it’s bound to happen but I’m just glad to hear about limp mode, I never knew that was a thing.
Senior Member
Joined: Dec 2013
Posts: 14,975
Likes: 6,035
From: SE Michigan
Tip - ALWAYS get paperwork. They can print a copy of something for every visit. That way you have DOCUMENTATION for the future if you need it. For example, Lemon Law claims.
I never leave a dealership without a copy of paperwork.
I never leave a dealership without a copy of paperwork.
5 Year Member
Joined: Sep 2017
Posts: 1,220
Likes: 455
From: Near Macomb, Illinois
It could be a freak one time thing. I was at a friends house and went to start my truck with the key. Nothing. I had time to think the guys house I was at just bought a GMC and I'm going to catch crap if my Ford won't start. Took the key out and tried again and it started up. Hasn't happened since.
Blunt
Joined: Mar 2015
Posts: 4,034
Likes: 1,086
From: Alberta, Canada
Well the good news is it seems like a false overheat reading so no damage done.
The other good news is that if it happens again you'll know it's not dying.
Further good news, a sensors should be an easy fix.
Not sure why they didn't replace the temp sensors but it could be a freak issue. In 2015 I had a 4x4 system malfunction come up which also disabled my ABS, this was in the middle of summer and I hadn't used my 4x4 since winter. Turned it off, started back up, never had it come back since.
The other good news is that if it happens again you'll know it's not dying.
Further good news, a sensors should be an easy fix.
Not sure why they didn't replace the temp sensors but it could be a freak issue. In 2015 I had a 4x4 system malfunction come up which also disabled my ABS, this was in the middle of summer and I hadn't used my 4x4 since winter. Turned it off, started back up, never had it come back since.
pacrew
Joined: Jul 2011
Posts: 239
Likes: 3
From: pittsburgh
So when should I feel it would be ok to take my family on a vacation driving my new $50,000 truck? Should I drive only when its daylight and early evening hours in case it breaks down someone could come tow it? Should I drive it for a year to make sure all the bugs are out of it?
5 Year Member
Joined: Mar 2015
Posts: 2,456
Likes: 789
From: Anchorage, AK
So when should I feel it would be ok to take my family on a vacation driving my new $50,000 truck? Should I drive only when its daylight and early evening hours in case it breaks down someone could come tow it? Should I drive it for a year to make sure all the bugs are out of it?
