U1120 — OBD-II trouble code

A network / communication OBD-II trouble code. Below are the vehicles and failure patterns where owners report it, drawn from NHTSA complaints.

In ProblemsByVin's analysis of the NHTSA owner-complaint record, owners cite U1120 across 5 vehicle failure patterns. Diagnostic codes in complaints are reported by owners and are unverified — they point to where this code shows up, not a confirmed diagnosis. Open a page below for the full pattern (symptoms, mileage, repair costs owners cite).

Vehicles where owners report U1120 5 patterns

2014 Dodge Charger

powertrain — Transmission slipping, rough shifting, loss of power during acceleration

2011 Chrysler Town and Country

brakes — ABS module failure and multiple system outages

2009 Jeep Patriot

electrical — Engine stalling and loss of power (intermittent, undiagnosed)

2007 Dodge Caliber

electrical — TIPM (Totally Integrated Power Module) corrosion and failure

2006 Dodge Charger

cruise control — Post-refuel stalling

Codes are pulled from what owners wrote in their NHTSA filings — they're allegations, not a shop diagnosis. Always confirm with a live scan. Browse all diagnostic codes →