U0001 — High-speed CAN communication bus fault

Code U0001 is a standard OBD-II diagnostic trouble code: High-speed CAN communication bus fault.

In our record, U0001 is reported most often on Jeep, Chrysler and RAM vehicles , against steering and powertrain failure patterns , across 2009–2023 model years.

In ProblemsByVin's analysis of the NHTSA owner-complaint record, owners cite U0001 across 11 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 U0001 11 patterns

2023 Jeep Wrangler

steering — Loss of Power Steering / Steering Stiffness

2018 Chrysler Pacifica

powertrain — Transmission failure and harsh shifting

2017 Chrysler Pacifica

electrical — Engine Stalling / Loss of Power

2017 Jeep Grand Cherokee

powertrain — Transmission Shift Refusal / Lockup

2017 Jeep Renegade

electrical — Electrical system warning lights—false or cascading malfunction alerts

2017 RAM 1500

steering — Electronic Power Steering (EPS) Loss of Assist / Complete Failure

2016 Chrysler 200

steering — Electronic Power Steering Shutdown During Driving

2014 Dodge Durango

steering — Power steering loss / hardening

2014 Jeep Cherokee

powertrain — 9-Speed Transmission - Hesitation, Surging, and Erratic Shifting

2013 FIAT 500

powertrain — Clutch Diaphragm Spring Failure

2009 Toyota Highlander

electrical — Electrical system loss of power while driving

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 →