U2023 code in owner complaints

Code U2023 is named in 9 US owner complaints. Models: 3, model years 2005–2008.

There is little data for this code or its meaning is ambiguous, so this page is not indexed.

What the code means

This is a manufacturer-specific code: the meaning depends on the make and sometimes on the year.

How to read U2023: the letter U means network communication between modules; the second digit 2 marks a manufacturer code whose meaning is set by the make; the last three characters 023 identify the specific fault.

ABS/ESC codes: wheel speed sensors, the ABS hydraulic unit and pump, brake booster, pressure and yaw sensors. A hit to a wheel or suspension often damages the wheel speed sensor or its wiring, so on a damaged car this code is a reason to inspect the hub, knuckle and control arms, not just swap the sensor.

Key figures

Complaints with this code: 9
Models: 3
Model years: 2005–2008

Which models and years

Models whose owners name this code (3). Years link to the model year problems page.

Model	Years	Complaints
Ford Escape Hybrid	2007, 2008	5
Ford Escape	2005, 2008	3
Mercury Mariner Hybrid	2008	1

Components named together with the code

Component as the owner filed it (one complaint can list several).

Service brakes 9
Fuel system 1
Powertrain 1

Complaints by model year

2005 1
2007 1
2008 7

What to do if an auction car has this code

Inspect the wheel and suspension on the impact side: the wheel speed sensor is often damaged together with the hub or knuckle.
Check whether the ABS and ESC lights stay on after start-up.
After replacing sensors or the hydraulic unit, bleeding and scan tool adaptation may be required.

What owners report

Excerpts of owner complaints in the original wording. Owner statements not verified by the regulator; personal data removed.

The contact also mentioned that the brake hydraulic control unit was replaced several times and the repair did not correct the failure. The contact also advised that that several codes was received when the diagnostic was performed code 1491 and code U2023. The manufacturer was contacted.
Ford Escape 2008 · 2020-01
The abs light comes on and off. Gave the vehicle for diagnostics to mechanic - codes U0418 invalid data from brake control module, codes C1478, C1479, C1480, wheel brake pressure control plausibility, U2023 communication network fault, mechanic gave estimate of $5542.00 to replace abs control assembly.
Mercury Mariner Hybrid 2008 · 2019-01
Took it to local ford dealer. He read codes 1478, 1480 and U2023. Quoted me that I need the abs module replaced at usd 5,537.00 plus tax. This is above the kbb value of the car. Investigating on the net there is easily hundreds of the samecomplaint of people loosing their car as it is beyond economical repair.
Ford Escape Hybrid 2008 · 2018-04

Related codes

Sources: public official US data (owner complaints) and the SAE J2012 standard. Complaints are owner statements not verified by the regulator. A code from a complaint does not replace a scan tool diagnosis. Data updated 2026-11-10.