U0100 — Lost communication with the engine / powertrain control module (ECM/PCM A)

Code U0100 is a standard OBD-II diagnostic trouble code: Lost communication with the engine / powertrain control module (ECM/PCM A).

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In our record, U0100 is reported most often on Chevrolet, Dodge and Ford vehicles , against electrical and powertrain failure patterns , across 2006–2021 model years.

In ProblemsByVin's analysis of the NHTSA owner-complaint record, owners cite U0100 across 32 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 U0100 32 patterns

2021 Honda Civic

electrical — Engine stalling with oil and battery warning lights

2020 Chevrolet Silverado

brakes — Complete brake system failure / loss of braking power

2020 Chevrolet Malibu

electrical — Loss of Engine Power and Complete Shutdown

2019 Chevrolet Tahoe

electrical — Reduced steering assist and drivability fault

2019 GMC Sierra

brakes — Complete or severe loss of brake power (pedal to floor, 5-10% braking capacity)

2018 Chevrolet Malibu

electrical — Check Engine Light / Engine Power Reduced

2018 Chevrolet Colorado

powertrain — Complete engine shutdown or power loss while driving

2018 Dodge Charger

electrical — Lost ECM/PCM communication and dashboard blackout

2018 Ford Ecosport

engine — Oil pump belt tensioner failure causing low oil pressure and engine failure

2017 Dodge Durango

electrical — Electrical System Cascade Failure & Loss of Multiple Controls

2017 Ford Explorer

steering — Electric power steering system fault / loss of power steering assist

2016 Jeep Wrangler

brakes — ABS Module Internal Failure (C2200 DTC)

2015 Dodge Durango

powertrain — Transmission fails to engage or stay in Park; vehicle rolls away unattended

2015 Nissan Rogue

steering — Power steering system electrical failure with chassis control malfunction

2014 Chevrolet Malibu

electrical — Complete Electrical Shutdown While Driving

2014 Dodge Charger

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

2014 Ford Focus

electrical — Loss of power and stalling (limp mode / complete shutdown)

2013 Chevrolet Cruze

electrical — Check Engine Light and Multiple Cascading Fault Codes

2012 Chevrolet Equinox

powertrain — Transmission Hard Shifts, Lurching, & Loss of Power

2012 Ford Focus

powertrain — Transmission Control Module (TCM) Failure

2010 Mazda Mazda3

electrical — Wiring Harness Faults & Battery Connection Issues

2009 Toyota Highlander

electrical — Electrical system loss of power while driving

2008 Cadillac CTS

powertrain — Multiple System Failure / Loss of Engine Control

2008 Toyota Prius

electrical — Combination Meter / Instrument Cluster Failure

2007 Chevrolet Silverado

powertrain — Engine stalling and loss of power

2006 Chevrolet Equinox

brakes — Unwanted ABS Engagement at Low Speeds

2006 Chevrolet Cobalt

steering — Electrical communication failure between body control modules

2006 Chrysler 300

steering — Engine Stalling After Refueling (Post-Fuel Stall)

2006 Dodge Charger

electrical — Stalling while driving — intermittent, multiple speeds

2006 Dodge Charger

engine — PCM (Powertrain Control Module) Dropout & Electrical Shutdown

2006 Dodge Charger

powertrain — Random engine stalling and loss of power

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 →