U2100: On Ford and Lincoln, U2100 means a module reports that its initial configuration is not complete

Initial configuration not complete (Ford, Lincoln)

Severity: Inspect soon

A Ford dealer read U2100 in the restraints control module with the airbag warning light on, and airbags are safety-critical, so have it inspected soon instead of waiting.

Safety-critical system: explanation only, no DIY steps. Source: how we rate severity

U2100 in short

On Ford and Lincoln, U2100 means a module says its setup (configuration) is not complete. It often follows module replacement, a software update or a battery loss, and a Ford dealer found it in the restraints module with the airbag light on. Have a shop re-run the programming; do not just clear it.

New or reprogrammed modules need vehicle-specific setup data written to them. If that did not finish, or the data was lost, the module stores U2100 and may not take part in the network.

A public Ford-specific listing ties it to module replacement, software updates and loss of battery power. One Lincoln owner reports it after a failed dealer software update, and one Ford owner reports a dealer reading it in the restraints control module with the airbag light on and a software reprogram as the fix.

A Lincoln bulletin also links U2100 and U2101 to the MyLincoln app not connecting on 2015-2016 MKC, MKX and MKZ with the telematics unit.

Pick your make

U2100 is a manufacturer-specific code: its meaning depends on who built the car.

Other makes: meaning not verified. Check with a scan tool that reads manufacturer definitions.

Most likely causes

Cause 1: Module setup not completed after replacement, update or power loss
Supported by vehicle data
Why it ranks here
The Ford-specific description ties U2100 to replacement, updates and lost battery power, and a Lincoln owner got it after a failed dealer update with a good battery.
What would change this
Rises if the code appeared right after module, software or battery work. Falls if the car has had no such work.
Cause 2: Restraints control module needing new software
Supported by vehicle data
Why it ranks here
A Ford dealer told a Fusion owner that Ford had instructed dealers to reprogram the restraints control module for U2100 with the airbag light on.
What would change this
Rises if the code is stored in the restraints module with the airbag light on. Falls if it is stored in a different module.
How to test the body control module (bcm)
Cause 3: Telematics control unit setup problem (2015-2016 Lincoln)
Supported by vehicle data
Why it ranks here
Lincoln bulletin SB-45317 is about MyLincoln app connection failures with U2100 and/or U2101 on cars with the telematics control unit; only the NHTSA summary was read.
What would change this
Rises if the Lincoln app cannot connect and the code is in the telematics module. Falls on other makes or models.

What to test first

Start at step 1. Each result tells you what it means and where to go next.

Step 1: Have all modules scanned with a tool that reads the whole network, and note which module stores U2100.
Low riskTool: full-network scan tool
- IfThe restraints control module stores it and the airbag light is on
  It meansTreat it as an airbag fault and go to a shop.
  Go to step 2
- IfA telematics or other module stores it, and the car has had recent module, battery or software work
  It meansThe setup likely was not finished.
  Points to: Module setup not completed after replacement, update or power loss
Step 2: Ask a Ford or Lincoln dealer to redo the module configuration or software update and check your VIN for programming bulletins.
Best left to a shop
Warning:Airbag system work and module programming need the right equipment and procedure; do not disconnect airbag parts yourself.
- IfThe code clears after reprogramming and stays away
  It meansSetup was the problem.
  Points to: Restraints control module needing new software
- IfThe code returns after correct programming
  It meansAsk the shop to test the module and its network power and ground.
  Points to: Module setup not completed after replacement, update or power loss

Symptoms

Airbag warning light on Gets more serious: stop and have it checked.
Check engine light or a warning from a module that was just replaced or updated
Lincoln app unable to connect (2015-2016 with telematics unit)

How to fix

This is a safety-critical system, so we explain the code but don't give repair steps. Have it inspected by a qualified technician.

On your vehicle

Lincoln

2015–2016
Supported by vehicle data
Lincoln SB-45317 covers the MyLincoln app not connecting with U2100 and/or U2101 on 2015-2016 MKC, MKX and MKZ with the telematics unit. Whether it is still current is not verified.

SB-45317Status unverified
MyLincoln Mobile app not able to connect, DTC U2100 and/or U2101
2015–2016mkc, mkx, mkz · NHTSA 10058665
For vehicles with the telematics control unit that set U2100 and/or U2101. The NHTSA summary does not say what the repair is.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Ford

2017 · Fusion
Supported by vehicle data
Ford SSM 46109 covers some 2017 Fusion (and MKZ) built on or before 18 August 2016 with the air bag lamp on and U2100 in the restraints module; the listed repair is reprogramming. Whether it is still current is not verified.

SSM 46109Status unverified
Air bag lamp on some 2017 Fusion/MKZ, DTCs in the RCM including U2100
2017fusion · NHTSA 10090515
If U2100 and related codes are stored in the restraints control module, reprogram the module to the latest level and perform an as-built configuration. Applies to vehicles built on or before 18 August 2016.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

No curated relationships for U2100 yet.

All Module network (CAN bus) communication codes

U2100 questions

Can I clear U2100 myself?

Clearing it only hides it. The module needs its setup or software redone by a shop, and a Ford dealer reported the code with the airbag light on, so have that checked.

Sources and review

NHTSA complaint ODI 11523490: 2017 Ford Fusion — NHTSA (owner complaint)
NHTSA complaint ODI 11730101: 2017 Lincoln MKX — NHTSA (owner complaint)
U2100 (00-2F) Initial Configuration Not Complete (Ford) — TaT Scandata
Lincoln SB-45317: MyLincoln Mobile app cannot connect, DTC U2100 and/or U2101 (2015-2016 MKC, MKX, MKZ) — NHTSA (manufacturer communication)
Ford SSM 46109: air bag lamp on some 2017 Fusion/MKZ, DTCs in the RCM including U2100 — NHTSA (manufacturer communication)

Last reviewed: October 15, 2026
Written by: Saurabh K.
Editorial review: Pending
Technician review: Technician review pending

This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error

Severity: Inspect soon

Pick your make

Most likely causes

Cause 1: Module setup not completed after replacement, update or power loss

Cause 2: Restraints control module needing new software

Cause 3: Telematics control unit setup problem (2015-2016 Lincoln)

What to test first

Step 1: Have all modules scanned with a tool that reads the whole network, and note which module stores U2100.

Step 2: Ask a Ford or Lincoln dealer to redo the module configuration or software update and check your VIN for programming bulletins.