U0103 code: Lost Communication With Gear Shift Control Module A

Code U0103 is named in 15 US owner complaints. Models: 10, model years 2005–2020.

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

What the code means

Lost Communication With Gear Shift Control Module A. Generic meaning per SAE J2012 (the same for all makes).

How to read U0103: the letter U means network communication between modules; the second digit 0 marks a generic SAE code shared by all makes; the last three characters 103 identify the specific fault.

Codes for engine, transmission, transfer case and hybrid system modules. When valuing an auction car the key question is whether the fault is crash related (cut wiring, damaged radiator) or a known defect of the model.

Key figures

Complaints with this code: 15
Models: 10
Model years: 2005–2020

Which models and years

Models whose owners name this code (10). Years link to the model year problems page.

Model	Years	Complaints
Chrysler Pacifica	2017, 2018	2
Dodge Charger	2006, 2009	2
Jeep Grand Cherokee	2005, 2007	2
Volkswagen EOS	2013, 2016	2
Volkswagen Golf	2014, 2017	2
Dodge Nitro 4X2	2007	1
Ford Escape Hybrid	2020	1
Honda Ridgeline	2020	1
Jeep Cherokee	2018	1
Mercedes-Benz C 300	2015	1

Components named together with the code

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

Electrical system 10
Powertrain 8
Engine 3
Exterior lighting 2
Air bags 1
Engine and cooling 1
Forward collision avoidance 1
Service brakes 1

Complaints by model year

2005 1
2006 1
2007 2
2009 1
2013 1
2014 1
2015 1
2016 1
2017 2
2018 2
2020 2

What to do if an auction car has this code

Separate crash damage (wiring, radiator, mounts) from known model defects: see the model year problems page.

What owners report

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

The vehicle was turned off and restarted and independently reset. The vehicle was taken to an independent mechanic, and DTC: U0103, P0914, and B1162-29 were retrieved. The contact referenced a repair under TSB: 2047609. The vehicle was taken to a dealer but was not diagnosed.
Volkswagen Golf 2017 · 2026-09
Christian Brothers Automotive had replaced both batteries and the service shifter module. The warning continued, with stored codes U0103, U1465, U1467, and U11E3. Mall of Georgia Chrysler identified the same codes but again replaced the main battery and service shifter module.
Chrysler Pacifica 2017 · 2026-09
Upon the ridgeline being towed to the local Honda dealer. They scanned for codes, U0103, U0155, U0404, U12AA. Checked Diag Tree and confirmed system test and found SBW control module and gauge control module didn't communication. They ended up finding a fuse had blown.
Honda Ridgeline 2020 · 2023-06

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.