P0305 on Cadillac vehicles Cylinder 5 is misfiring
P0305 is named on 7 Cadillac model years (2018–2022): 7 manufacturer filings and 0 owner reports in NHTSA’s files, across ATS, CT5, CT6, CTS, CTS-V.
Which Cadillac model years name P0305
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2022 Cadillac CT5 | Electrical System | 1 | — |
| 2019 Cadillac ATS | Electrical System | 1 | — |
| 2019 Cadillac CTS | Equipment | 1 | — |
| 2018 Cadillac ATS | Equipment | 1 | — |
| 2018 Cadillac CT6 | Electrical System | 1 | — |
| 2018 Cadillac CTS | Engine | 1 | — |
| 2018 Cadillac CTS-V | Equipment | 1 | — |
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.
Cadillac filings that name P0305
Source: NHTSA manufacturer communicationsBulletins and campaigns Cadillac filed with NHTSA whose summary names P0305. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 21-NA-036 Service bulletin2022-03-11 · Electrical System
- This service bulletin advises the technician of a diagnostic test for a possible issue with a damaged OCV solenoid that may cause an oil leak and misfire, illuminating the MIL and setting DTCs P0300, P0302 and/or P0305.
What P0305 means
Source: SAE J2012 / OBD-IICylinder 5 is misfiring.
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 P0305 a known problem on Cadillac vehicles?
It is a documented one: NHTSA's files hold 7 manufacturer filings and 0 owner reports naming P0305 on 7 Cadillac model years (2018–2022). 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 P0305 appear on most?
2019 ATS (1 document), 2018 ATS (1 document), 2022 CT5 (1 document).
Does P0305 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.