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Hi. 4x4 does not work on my escape/euro maverick. Fault code U2023 is permanent. ABS and 4x4 warning lights are never lit, not even when starting the car. (this bugs me for some reason) O/D light does also never light up. Jacked the car up and checked ABS tone rings, all ok. Tester gives nominal impulse readings from all wheels, so sensors must be ok too. Checked all wiring and connectors from underneath the car and all looks ok, including wires going to the rear diff. To my understanding, U2023 code refers to a CAN bus issue between module and node. What should I check next and does anybody know a solution for this problem? Thanks! P.S. I've tried searching the internets and this forum, but got nothing that would help me. a grand total of nobody has posted what caused this issue and how they fixed it, as usual. :D
Your instrument cluster lights were not illuminating at startup or while driving, because the last guy who was trying to sell the vehicle gave up and removed the IC and cut the leg of the LEDs for the 4x4 light and the abs light.... But good job on ya for resolving ur issue
 

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2020 Ttanium Hybrid/1978 F-250 Custom
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I feel I owe everyone an apology.

It has been too long since I've given an update.
Trust me, there's nothing I hate more than an incomplete thread, where a fault is specified but no solutuion or follow-up is give.
And because of that, I apologize to everyone who is struggling with this fault, all over the internet.

The Russo-Ukranian war has really taken almost all of my time, for reasons I will not get into.
All I will say, is that I'm not russian or Ukranian, and that I am safe.

This is the part you want to read:
Sadly, for now I cannot report what was causing the problem, but I can say that it was either one of the following 3, or at least a combination of two to all of them.

I replaced the front left abs sensor, the 4wd control box and the rear diff.
This fixed the problem, the fault codes have not returned and the system works as intended.

I still have the original parts and hopefully I'll be able to resolve as to which of them was causing the actual fault.
But please do not hold your breath for it.
I am verry sorry to everyone that I cannot give a definitive answer to the fault, but I hope I can provide one as soon as possible.

However, I am preparing and fixing the car so that I can sell it. With the current fuel prices, It's just nuts to have an early 90's spec 3 litre v6, with a 4 speed traditional automatic.

I hope to find the cause of the problem, I really do.
But I also hope the world will forgive me if I can't meet that objective.

I am so sorry.
You need to forgive yourself… I appreciate the follow up.

thanks
It is hard to guess which part fixed your codes, but I would suspect the ABS sensor.
 

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You need to forgive yourself… I appreciate the follow up.

thanks
It is hard to guess which part fixed your codes, but I would suspect the ABS sensor.
I have the same problem as the original poster on an 05 excape. I have u2023 and c1233 front left speed sensor...the symptom is when I first start the truck when it first,n only first, shifts into 2nd gear it bangs in the rear...I also noticed when turning sharp right the abs activates...
I'll be replacing the front left speed sensor later today. And I'll keep ya posted
 
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