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Diagnostic trouble code

U0102

0 owner reports and 107 manufacturer filings across 25 model years from Cadillac, Chevrolet, Chrysler, Dodge and others.

NetworkGeneric OBD-II code107 manufacturer filings

Where U0102 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—
2019 Cadillac EscaladeElectrical System4—
2018 Chevrolet SilveradoElectrical System4—
2019 Chevrolet Silverado 2500HDEquipment4—
2019 Chevrolet SuburbanElectrical System4—
2019 Chevrolet TahoeEquipment4—
2018 GMC SierraEquipment4—
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—
2021 Chrysler 300Power Train1—
2021 Dodge ChallengerElectrical System1—
2021 Dodge ChargerElectronic Stability Control1—

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 40Engine 4Equipment Adaptive/Mobility 3Steering 3Suspension 2
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Manufacturer filings that name it

Source: NHTSA manufacturer communications

Service bulletins and campaigns whose filed summary names U0102. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.

What U0102 means

Source: SAE J2012 / OBD-II

U0102 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 U0102

Source: NHTSA files and the OBD-II standard

Can I keep driving with U0102 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.