Ford Repair Questions? Ask a Mechanic for Answers ASAP
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One moment while I read this over
did you replace the CHT sensor located on the rear of the passenger side cylinder head
yes thats in my info
ok afterwards did you clear the codes?
codes were back within 1 min
Ok then there is a problem with the wiring
checked the harness... nothing was pinched
The code P1289 is specific with that sensor either the wiring is bad or its with the engine coolant temp sensor but I dont thing so its more common to be within the wiring at the CHT sensor
This is common for rubbing threw at the head or getting frayed in the sub harness
If the harness looked fine and there is now a new sensor where do the wires go from there?
Either there is a problem with the CHT sensor you replaced bad from the box I will check the wiring diagram right now
The problem is with the PCM then if the sensor is not bad and the wiring is good
thats what I didnt want to hear, lol
one thing to do after replacement according to ford
did you get a oem sensor
I had a diagnostic from ford and why would it not mention a problem with the pcm
Its less common to be a bad pcm
Those are the 3 causes for the code P1289
that sucks. Thats why I replaced everything else first
I would try another sensor before going towards the pcm
You have done everything properly but I have gotten bad ones out of the box!
would be nice if they pay the cost of the job
Did you do it or ford?
Last time I went into ford it still had the knock code also. They did a knock test and it passed so they just shrugged there shoulders. Two months later the code was back and my warranty was out
I did it this time
Only pain was getting the manifold out.
What I would do if this was me get another sensor and harness they are cheap replace it again before looking at www.car-parts.com for a used PCM
Is the harness easy to replace
Just to cover the bases then if the problem is still there get a cheap used PCM from the site above better price than any OEM place
Thanks for your help. Ill do the job again.