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Diagnostic trouble code

U0104

2 owner reports and 114 manufacturer filings across 27 model years from Cadillac, Chevrolet, GMC, Honda and others.

NetworkGeneric OBD-II code114 manufacturer filings2 owner reports

Where U0104 shows up

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2017 Cadillac EscaladeEquipment8—
2017 Chevrolet SuburbanEquipment8—
2017 Chevrolet TahoeEquipment8—
2017 GMC YukonEquipment8—
2018 Cadillac EscaladeEquipment6—
2018 Chevrolet SuburbanEquipment6—
2018 Chevrolet TahoeEquipment6—
2018 GMC YukonEquipment6—
2017 Chevrolet SilveradoElectrical System5—
2017 GMC SierraElectrical System5—
2025 Ram 1500Power Train5—
2019 Cadillac EscaladeElectrical System4—
2018 Chevrolet SilveradoElectrical System4—
2019 Chevrolet Silverado 2500HDEquipment4—
2019 Chevrolet SuburbanElectrical System4—
2019 Chevrolet TahoeEquipment4—
2018 GMC SierraEquipment4—
2021 Jeep Grand CherokeeVehicle Speed Control4—
2019 GMC Sierra 2500HDElectrical System3—
2019 GMC YukonElectrical System3—
2020 Cadillac EscaladeElectrical System2—
2020 Chevrolet SuburbanElectrical System2—
2020 Chevrolet TahoeElectrical System2—
2020 GMC YukonElectrical System2—
2019 Honda PassportForward Collision Avoidance—1
2017 Honda PilotElectrical System—1
2022 Jeep Grand WagoneerPower Train1—

A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.

What it gets filed under

Electrical System 51Equipment 40Power Train 6Engine 4Equipment Adaptive/Mobility 3Steering 3
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What owners said

Source: NHTSA complaint database

Owners’ own words, one per nameplate, scrubbed of anything identifying. These are unverified reports filed with NHTSA — they are what was said, not a finding that it was true.

The vehicle was diagnosed and produced codes: by001c-swlka and u0104, indicating “A Loss of Communication with the Body Control Module) however, the contact was not provided a clear diagnostic result of what parts needed to be replaced
2017 Honda Pilotat 108,000 milesFeb 17, 2023NHTSA owner report

Manufacturer filings that name it

Source: NHTSA manufacturer communications

Service bulletins and campaigns whose filed summary names U0104. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.

What U0104 means

Source: SAE J2012 / OBD-II

U0104 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.

A stored code names the test that failed, never the part that caused it. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.

Common questions about U0104

Source: NHTSA files and the OBD-II standard

Can I keep driving with U0104 stored?

Nobody can answer that from the code alone, and a site that does is guessing. A steady light generally means the fault was logged and the vehicle is in a reduced-risk mode; a flashing light means stop soon, because a misfiring engine can destroy a catalytic converter in minutes. The safe read of this page is the mileage and the components, not permission.

Does a code mean the car is recalled?

No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.

Why do the counts here differ from other sites?

Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.

Will clearing the code fix it?

Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.