P1233 on Hyundai vehicles
P1233 is named on 5 Hyundai model years (2016–2019): 8 manufacturer filings and 1 owner report in NHTSA’s files, across Sonata, Tucson.
Which Hyundai model years name P1233
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2019 Hyundai Sonata | Engine | 2 | — |
| 2018 Hyundai Sonata | Engine | 2 | — |
| 2017 Hyundai Sonata | Engine | 2 | — |
| 2016 Hyundai Sonata | Engine | 2 | — |
| 2017 Hyundai Tucson | Fuel/Propulsion System | — | 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.
What Hyundai 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.
Check engine code P1233 stored & retrieved by scanner, indicating fuel pump issue -- (potentially a low pressure fuel pump leak similar to Hyundai TSB 23-FL-004H?), which may present fire hazard from leaking fuel
Hyundai filings that name P1233
Source: NHTSA manufacturer communicationsBulletins and campaigns Hyundai filed with NHTSA whose summary names P1233. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 23-FL-004H Service bulletin2023-06-29 · Engine And Engine Cooling
- Certain 2015-2019MY Sonata (LFA) vehicles may intermittently exhibit reduced engine power, a “Crank/No Start” condition, and/or have DTC P1233 stored in the ECM due to an internally leaking fuel pump filter housing. Hyundai is extending warranty coverage for fuel pump filter assembly repair or replacement to 15 years / 150,000 miles from the date of original retail delivery or date of first us
- 23-FL-004H Service bulletin2023-06-29 · Engine And Engine Cooling — Engine — Engine Control Module (Ecu/Ecm)
- Certain 2015-2019MY Sonata (LFA) vehicles may intermittently exhibit reduced engine power, a “Crank/No Start” condition, and/or have DTC P1233 stored in the ECM due to an internally leaking fuel pump filter housing. For vehicles exhibiting one or more of these conditions, Hyundai is extending warranty coverage for fuel pump filter assembly repair or replacement to 15 years / 150,000 miles from the
What P1233 means
Source: SAE J2012 / OBD-IIP1233 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 Hyundai 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 P1233 a known problem on Hyundai vehicles?
It is a documented one: NHTSA's files hold 8 manufacturer filings and 1 owner report naming P1233 on 5 Hyundai model years (2016–2019). 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 Hyundai models does P1233 appear on most?
2019 Sonata (2 documents), 2018 Sonata (2 documents), 2017 Sonata (2 documents).
Does P1233 on a Hyundai 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.