Project Cars or Member’s Cars sub forum for the build threads so readers can follow the creation or re-creation of a high performance Caddy. Whether it is a CTS-V, a 1970 Eldorado, a Northstar powered Eldo, etc. , an organized way of finding and enjoying and learning from others who have the need to modify their rides for performance or racing.
Looking for a reliable and trustworthy auto repair shop? Look no further! B & B Automotive LLC offers all-inclusive service across most major brands and half off Dealer prices. Featuring Head Studs for Cadillac Repairs.
This appears to be an intermittent code because it is history.
Why was this sensor replaced? Did you test the old sensor with an ohm meter for accuracy and proper calibration with an ohm meter? The resistance and temp parameters are in the FSM.
What was the connector like when you replaced it? Did the connector feel loose when it was removed and replaced? Is there corrosion on the connector contacts?
The description of this code:
The DTC detects a CONTINUOUS open or short to HIGH in the ECT signal circuit or the ECT sensor.
I suspect that the message "ENGINE HOT - AC OFF" is in fact because the AC is ON.... and that you are actually getting similar conditions with the AC OFF, but because the AC is OFF, you don't get this message. You seem to be getting a FALSE message.
I have a feeling that your TEMP gauge is inaccurate and probably HIGH. Do not ignore this code, get this fixed, you will NEVER know if in fact you are overheating.
Check the connector at the ECT sensor for corrosion, looseness and that it is properly connected. Check the wiring all the way up as far as you can go for burns and breaks
Also, show us a photo of the gauge with the AC off. Notice if you see the gauge jumping up to HOT while you drive.
Let us know what you can find.
I am a huge fan beginning with 91 obd1 4.9
I just spent 3 months working on an 89 350 ci TBI system, all the controls were there but the interface was antiquated as it flashed codes like my oil burner lol
I am not a fan of many 90s vehicles, even early 90s. Only what was left of the 70s was good in the 80s.
There were many many ugly cars in the 80s, quite a few had trouble because of all the emissions crap they couldnt keep up with.
New Guy here.I owned a 96 Eldorado years ago and loved it.It was stolen.I bought an 03 Mercury Marauder brand new.I drove it for 13 years.I did a lot of modifications to that car,very fast..In 2016 I bought a new Challenger,V6 305HP.I never really adapted to the car and wanted that Caddy ride....I just bought an 02 Eldorado.Love it..It needs some love..I'll be asking questions for sure.Thanks for having me.