P1098 on Cadillac vehicles
P1098 is named on 6 Cadillac model years (2019–2021): 38 manufacturer filings and 2 owner reports in NHTSA’s files, across Escalade, XT4, CT4, CT5, XT5.
Which Cadillac model years name P1098
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2021 Cadillac Escalade | Engine | 6 | 2 |
| 2020 Cadillac XT4 | Electrical System | 8 | — |
| 2020 Cadillac CT4 | Electrical System | 6 | — |
| 2020 Cadillac CT5 | Electrical System | 6 | — |
| 2020 Cadillac XT5 | Electrical System | 6 | — |
| 2019 Cadillac XT4 | Electrical System | 6 | — |
A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
What Cadillac owners said
Source: NHTSA complaint databaseOwners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.
In early February, 2026, a check engine light produced code P1098, engine coolant control valve position sensor performance
Cadillac filings that name P1098
Source: NHTSA manufacturer communicationsBulletins and campaigns Cadillac filed with NHTSA whose summary names P1098. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 22-NA-082 Service bulletin2022-04-14 · Electrical System
- This technical bulletin provides repair information to correct a customer concern of Malfunction Indicator Lamp Illuminated with DTC P06DD, P2B60, P26BB, P1098 Set.
- 22-NA-082 Service bulletin2022-06-30 · Engine And Engine Cooling
- This technical bulletin provides repair information to correct a customer concern of Malfunction Indicator Lamp Illuminated with DTC P06DD, P2B60, P26BB, P1098 Set.
- PIP5675 Service bulletin2019-09-10 · Electrical System
- This Preliminary information communicates to the dealer that a customer may comment that the MIL light is illuminated. The technician may find P1098 and/or P26BB set current or history. That this may be caused by a software anomaly, and that GM is currently looking into the issue. It provides testing and related direction based on the results.
- PIP5675A Service bulletin2020-01-17 · Electrical System
- This Preliminary information communicates to the dealer that a customer may comment that the MIL light is illuminated. The technician may find P1098 and/or P26BB set current or history. That this may be caused by a software anomaly, and that GM is currently looking into the issue. It provides testing and related direction based on the results.
- PIP5675B Service bulletin2020-03-16 · Electrical System
- This Preliminary information communicates to the dealer that a customer may comment that the MIL light is illuminated. The technician may find P1098 and/or P26BB set current or history. That this may be caused by a software anomaly, and that GM is currently looking into the issue. It provides testing and related direction based on the results.
- PIP5675D Service bulletin2020-05-20 · Air Bags
- This Preliminary information communicates to the dealer that a customer may comment that the MIL light is illuminated. The technician may find P1098 and/or P26BB set current or history. That this may be caused by a software anomaly, and that GM is currently looking into the issue. It provides testing and related direction based on the results.
- PIP5675E Service bulletin2020-06-25 · Electrical System
- This Preliminary information communicates to the dealer that a customer may comment that the MIL light is illuminated. The technician may find P1098 and/or P26BB set current or history. That this may be caused by a software anomaly, and that GM is currently looking into the issue. It provides testing and related direction based on the results.
What P1098 means
Source: SAE J2012 / OBD-IIP1098 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. The record above is what Cadillac and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs P1098 a known problem on Cadillac vehicles?
It is a documented one: NHTSA's files hold 38 manufacturer filings and 2 owner reports naming P1098 on 6 Cadillac model years (2019–2021). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Cadillac models does P1098 appear on most?
2021 Escalade (8 documents), 2020 XT4 (8 documents), 2020 CT4 (6 documents).
Does P1098 on a Cadillac mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.