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Diagnostic trouble code

P1098

45 owner reports and 69 manufacturer filings across 20 model years from Buick, Cadillac, Chevrolet, GMC.

PowertrainManufacturer-specific69 manufacturer filings45 owner reports

Where P1098 shows up

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2021 GMC SierraEngine—11
2021 Cadillac EscaladeEngine And Engine Cooling62
2020 Cadillac XT4Electrical System8—
2021 Chevrolet SilveradoEngine—8
2020 Chevrolet SilveradoElectrical System61
2020 Cadillac CT4Electrical System6—
2020 Cadillac CT5Electrical System6—
2019 Cadillac XT4Electrical System6—
2020 Cadillac XT5Electrical System6—
2020 Chevrolet BlazerElectrical System6—
2020 GMC AcadiaElectrical System6—
2020 Buick EncoreElectrical System5—
2022 Chevrolet SilveradoPower Train—5
2023 GMC SierraEngine—5
2022 GMC SierraPower Train—5
2020 GMC SierraElectrical System5—
2022 Chevrolet TahoeEngine—4
2023 Chevrolet SilveradoEngine—3
2021 Chevrolet TrailblazerElectrical System3—
2023 Chevrolet TrailblazerEngine—1

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 51Engine 26Air Bags 11Power Train 10Engine And Engine Cooling 5Unspecified 5
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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.

On May 24, 2026, while driving on the highway, the vehicle suddenly overheated, displayed fault code P1098, and entered reduced power ("limp mode")
2022 GMC SierraJun 5, 2026NHTSA owner report
In early February, 2026, a check engine light produced code P1098, engine coolant control valve position sensor performance
2021 Cadillac EscaladeMar 16, 2026NHTSA owner report
When pulling codes off the vehicle there is a p1098 which refers to the engine coolant control valve
2021 Chevrolet SilveradoFeb 10, 2026NHTSA owner report
Had p1098 code come up on car at 67000 issue coolant control valve assembly went bad
2023 Chevrolet TrailblazerFeb 5, 2026NHTSA owner report
The vehicle was taken to O'Reilly Auto Parts, where DTC: P1098 for the coolant control valve (CCV) assembly was retrieved
2022 Chevrolet Tahoeat 72,000 milesDec 4, 2025NHTSA owner report

Manufacturer filings that name it

Source: NHTSA manufacturer communications

Service bulletins and campaigns whose filed summary names P1098. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.

What P1098 means

Source: SAE J2012 / OBD-II

P1098 is a manufacturer-specific code: the second character is a 1, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.

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 P1098

Source: NHTSA files and the OBD-II standard

Why does this page not define P1098?

Because it cannot be defined honestly. The second character of a trouble code says who owns its meaning, and a 1 or a 3 hands that to the manufacturer. Sites that print one definition for a manufacturer-specific code are showing you one automaker's meaning and hoping it is yours.

Can I keep driving with P1098 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.