U18A2 on Chevrolet vehicles
U18A2 is named on 7 Chevrolet model years (2020–2025): 14 manufacturer filings and 2 owner reports in NHTSA’s files, across Malibu, Equinox.
Which Chevrolet model years name U18A2
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2022 Chevrolet Malibu | Electrical System | 3 | — |
| 2021 Chevrolet Malibu | Engine | 3 | — |
| 2020 Chevrolet Malibu | Engine | 3 | — |
| 2024 Chevrolet Malibu | Electrical System | 2 | — |
| 2023 Chevrolet Malibu | Engine | 2 | — |
| 2020 Chevrolet Equinox | Engine | — | 2 |
| 2025 Chevrolet Malibu | Electrical 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 Chevrolet 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.
The reader displayed the code U18A2 which indicates a "Lost Communication with Fuel Pump Control Module (FPCM)"
Chevrolet filings that name U18A2
Source: NHTSA manufacturer communicationsBulletins and campaigns Chevrolet filed with NHTSA whose summary names U18A2. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 21-NA-186 Service bulletin2022-08-26 · Electrical System
- This service bulletin provides repair information to correct a customer concern of Service Engine Soon Illuminated in DIC and/or a Malfunctioning Fuel Gauge with DTC U0076/U18A2/P1001/P1434 or Other Message Counter Incorrect Codes Set.
- 21-NA-186 Service bulletin2024-02-27 · Engine And Engine Cooling
- This service bulletin provides repair information to correct a customer concern of Service Engine Soon Illuminated in DIC and/or a Malfunctioning Fuel Gauge with DTC U0076/U18A2/P1001/P1434 or Other Message Counter Incorrect Codes Set.
- 21-NA-186 Service bulletin2025-01-07 · Electrical System
- This service bulletin provides repair information to correct a customer concern of Service Engine Soon Illuminated in DIC and/or a Malfunctioning Fuel Gauge with DTC U0076/U18A2/P1001/P1434 or Other Message Counter Incorrect Codes Set.
What U18A2 means
Source: SAE J2012 / OBD-IIU18A2 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 Chevrolet 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 U18A2 a known problem on Chevrolet vehicles?
It is a documented one: NHTSA's files hold 14 manufacturer filings and 2 owner reports naming U18A2 on 7 Chevrolet model years (2020–2025). 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 Chevrolet models does U18A2 appear on most?
2022 Malibu (3 documents), 2021 Malibu (3 documents), 2020 Malibu (3 documents).
Does U18A2 on a Chevrolet 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.