U1A00 on Lincoln vehicles
U1A00 is named on 6 Lincoln model years (2016–2024): 11 manufacturer filings and 0 owner reports in NHTSA’s files, across Corsair, MKC, MKS, MKT, Navigator.
Which Lincoln model years name U1A00
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2024 Lincoln Corsair | Not specified | 2 | — |
| 2016 Lincoln MKC | Equipment | 2 | — |
| 2016 Lincoln MKS | Equipment | 2 | — |
| 2016 Lincoln MKT | Equipment | 2 | — |
| 2016 Lincoln Navigator | Equipment | 2 | — |
| 2023 Lincoln Corsair | 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.
Lincoln filings that name U1A00
Source: NHTSA manufacturer communicationsBulletins and campaigns Lincoln filed with NHTSA whose summary names U1A00. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- SSM 54630 Service bulletin2026-03-05 · Unknown Or Other
- Some 2024 F-150/Escape/Corsair vehicles may exhibit no audio/no volume with diagnostic trouble code (DTC) U1A00:87 stored in the accessory protocol interface module (APIM). This may be due to the software in the front audio control module (ACM). To correct the condition, reprogram the ACM using the latest software level of the Ford Diagnosis and Repair System (FDRS). For claiming, use causal part
- SSM 54727 Service bulletin2026-04-08 · Electrical System
- Some 2024 F-150/Escape/Corsair vehicles may exhibit no audio/no volume with diagnostic trouble code (DTC) U1A00:87 stored in the accessory protocol interface module (APIM). This may be due to the software in the front audio control module (ACM). To correct the condition, reprogram the ACM using the latest software level of the Ford Diagnosis and Repair System (FDRS). For claiming, use causal part
- SSM-45809 Service bulletin2016-05-09 · Equipment — Other — Owners/Service/Other Manual
- SYNC 3 ACCESSORY PROTOCOL INTERFACE MODULE (APIM) DTCS U3000 OR B108E OR U1A00
- SSM 46048 Service bulletin2016-09-02 · Electrical System
- Some 2016-2017 Ford and Lincoln vehicles equipped with SYNC 3 may have DTCs U3000:04, B108E:12 and/or U1A00:87 present in the APIM. If these DTCs are present and no other symptoms are reported by the customer, then clear the DTCs and retest. If the DTC(s) do not return then no further repairs should be attempted. If one or more DTCs return as current faults and/or the customer reports other sympto
- SSM 52261 Service bulletin2024-02-14 · Equipment
- Some 2023 Escape vehicles with hybrid powertrain built on or before 27-Oct-2023 and 2023 Corsair vehicles with hybrid powertrain built on or before 24-Oct-2023 may exhibit an intermittent no audio condition with diagnostic trouble code (DTC) U1A00:87 stored in the accessory protocol interface module (APIM). When the audio volume control is adjusted using the steering wheel or the center display sc
What U1A00 means
Source: SAE J2012 / OBD-IIU1A00 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 Lincoln 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 U1A00 a known problem on Lincoln vehicles?
It is a documented one: NHTSA's files hold 11 manufacturer filings and 0 owner reports naming U1A00 on 6 Lincoln model years (2016–2024). 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 Lincoln models does U1A00 appear on most?
2024 Corsair (2 documents), 2016 MKC (2 documents), 2016 MKS (2 documents).
Does U1A00 on a Lincoln 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.