New member needing help!
Thread Starter
|
New User
Joined: Sep 2015
Posts: 6
Likes: 4
New member needing help!
Hey everyone, I have a 2000 Excursion Limited with a 6.8L. I'm having an issue with my CHT... I've replaced it 3 times now. I've also replaced the thermostat and flushed the coolant. With that being done the only thing left is checking the wiring to check for a break or a bad ECU... does anyone have or can lead me to a wiring schematic. And if anyone has had this issue before what was your outcome? I appreciate your time
Thread Starter
|
New User
Joined: Sep 2015
Posts: 6
Likes: 4
Ok... long story but here we go..... I first noticed a ruff idle and the ac stoped blowing out cold air.... hooked up the code reader and I go a misfire code and P1289... ("cht" high input) so I figured out that the clip for the fuel injector wire on cylinder one was broken and came off so I replaced the clip and replaced the CHT sensor, the AC started blowing out cold air right away..... a week later it stoped blowing out cold air again so diagnosed again and there were no active codes but there was the p1289 on the memory codes. So I cleared the codes and relaxed the CHT again... cold air far about a min thin warm air again.... diagnosed again and there are still no active codes but I'm getting a memory code of p1289 and I'm running in limp mode and my AC will not blow out cold air... so I've been going through what the trouble shooter to fix the p1289 and nothing has worked yet.
Thread Starter
|
New User
Joined: Sep 2015
Posts: 6
Likes: 4
I keep getting a P1289 code. "CHT high input" I've replaced it 3 times now.... I've read that it is just a false overheat code but I'm still running in limp mode and it is causing my AC not to blow out cold air. The weird thing is, the p1289 code is not comming up on the active codes it's coming up under the memory codes and it keeps comming back after I clear all the codes.
Laughing Gas
Joined: Nov 2014
Posts: 1,118
Likes: 4
From: Idaho
I feel like acronyms should be spelled out the first time they are used. I thought, what? when I saw that too.
Only time I ever got a cylinder head temperature code was when the little heater AC thing broke and blew all of my coolant out. lol
Might be a stupid question, but what kinds of engine temps are you seeing before it goes into limp mode?
Only time I ever got a cylinder head temperature code was when the little heater AC thing broke and blew all of my coolant out. lol
Might be a stupid question, but what kinds of engine temps are you seeing before it goes into limp mode?
Trending Topics
Tuned
Joined: May 2018
Posts: 287
Likes: 8
did you ever figure this out? I"m getting that code as well, but the engine isn't overheating.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
More Turbo
Joined: Dec 2017
Posts: 587
Likes: 6
I've never messed with this, but just thinking about it logically here. If you've replaced the sensor, and reset the codes, and everything works fine. Then it trips again, it sounds like you have a short/grounding problem. If you can verify the engine is indeed not getting hot that is.
Examine the wire the best you can for any rubbed or pinched spots. If you have a good meter, check the wires for continuity.
edit: just realized this is old, but maybe it'll help Kai.
Examine the wire the best you can for any rubbed or pinched spots. If you have a good meter, check the wires for continuity.
edit: just realized this is old, but maybe it'll help Kai.
Tuned
Joined: May 2018
Posts: 287
Likes: 8
I've never messed with this, but just thinking about it logically here. If you've replaced the sensor, and reset the codes, and everything works fine. Then it trips again, it sounds like you have a short/grounding problem. If you can verify the engine is indeed not getting hot that is.
Examine the wire the best you can for any rubbed or pinched spots. If you have a good meter, check the wires for continuity.
edit: just realized this is old, but maybe it'll help Kai.
Examine the wire the best you can for any rubbed or pinched spots. If you have a good meter, check the wires for continuity.
edit: just realized this is old, but maybe it'll help Kai.
Trailering
Joined: Apr 2004
Posts: 23
Likes: 9
Resolved, problem with short on sending wire of CHT
Thread
Thread Starter
Forum
Replies
Last Post