Ford U1A00
87 and/or U0184-00. Backup and warning chimes will continue to function normally. SERVICE ACTION Before demonstrating or delivering any new
Quick answer
For Ford vehicles in the supplied evidence, U1A00 appears in two distinct official communications. For certain 2016–2017 SYNC 3 vehicles, U1A00:87 may be stored in the APIM without customer-reported symptoms; the documented action is to clear the DTCs and retest. For the 2024 Mustang Mach-E communication, U1A00-87 may accompany loss of audio and an “Audio off” SYNC-screen message; backup and warning chimes continue to operate normally.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
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1. What does U1A00 mean?
For Ford vehicles in the supplied evidence, U1A00 appears in two distinct official communications. For certain 2016–2017 SYNC 3 vehicles, U1A00:87 may be stored in the APIM without customer-reported symptoms; the documented action is to clear the DTCs and retest. For the 2024 Mustang Mach-E communication, U1A00-87 may accompany loss of audio and an “Audio off” SYNC-screen message; backup and warning chimes continue to operate normally.
2. Technical explanation
Verified evidence identifies U1A00:87 in Ford communications, but does not establish a complete generic definition for U1A00 across all Ford vehicles. NHTSA Manufacturer Communication 10109054 (SSM 46048), published September 2, 2016, states that some 2016–2017 Ford and Lincoln vehicles equipped with SYNC 3 may have U3000:04, B108E:12, and/or U1A00:87 present in the APIM. When these DTCs are present and the customer reports no other symptoms, the communication directs technicians to clear the DTCs and retest. NHTSA Manufacturer Communication 11016352 (24U14), published March 13, 2025, states that loss of audio and an “Audio off” message on the SYNC screen may be accompanied by U1A00-87 and/or U0184-00; backup and warning chimes continue to function normally.
3. What system is affected?
SYNC 3 / SYNC audio-display functions are implicated by the verified communications. The 2016 communication specifically identifies the APIM as the module where U1A00:87 may be present.
4. How serious is this code?
Not yet established by verified evidence. The supplied evidence documents infotainment/audio symptoms in one communication and states that backup and warning chimes continue to function normally.
5. Symptoms you may notice
- Loss of audio and an “Audio off” message displayed on the SYNC screen may accompany U1A00-87 and/or U0184-00 in the 2024 Mustang Mach-E communication.
- For the 2016–2017 SYNC 3 communication, U1A00:87 may be present with no other customer-reported symptoms.
- Backup and warning chimes continue to function normally in the 2024 Mustang Mach-E communication.
6. Possible causes
- Not yet established by verified evidence.
7. Can I still drive the vehicle?
Not yet established by verified evidence.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- If audio is lost or “Audio off” is displayed, arrange Ford dealer or qualified service diagnosis using the applicable manufacturer communication.
- Do not assume that U1A00 has the same meaning or repair across all Ford models and model years.
- Do not perform high-voltage system repairs based on this code; the supplied evidence concerns SYNC/APIM and audio-related information.
10. Step-by-step troubleshooting
- For some 2016–2017 Ford and Lincoln vehicles equipped with SYNC 3, if U1A00:87 is present in the APIM and no other customer symptoms are reported, the verified communication instructs technicians to clear the DTCs and retest.
- Further diagnostic steps are not established by the supplied verified evidence.
11. When to contact service
Contact a Ford dealer or qualified service provider if U1A00:87 is accompanied by loss of audio or an “Audio off” message, or if the code returns after the documented clear-and-retest procedure.
12. What the service center may check
- Confirm the exact vehicle, model year, region, SYNC configuration, module, DTC suffix, and any customer-reported symptoms.
- For the applicable 2016–2017 SYNC 3 scenario with no other reported symptoms, clear the DTCs and retest as specified in SSM 46048.
- For the 2024 Mustang Mach-E audio concern, review manufacturer communication 24U14. Specific inspection and repair details are not included in the supplied evidence.
13. Possible repair or resolution
- For the applicable 2016–2017 SYNC 3 scenario with no other customer-reported symptoms, the documented resolution step is to clear the DTCs and retest.
- A repair resolution for recurring U1A00:87, or for the 2024 Mustang Mach-E audio condition, is not yet established by the supplied verified evidence.
14. Affected vehicles
- Ford C-MAX · 2016–2017 · US
- Ford Focus · 2016–2017 · US
- Ford Fusion · 2016–2017 · US
- Ford Mustang Mach-E · 2024 · US
15. Related TSBs / service bulletins
- NHTSA Manufacturer Communication 10109054: SSM 46048, published September 2, 2016. It covers some 2016–2017 Ford and Lincoln vehicles equipped with SYNC 3 and references U1A00:87 in the APIM.
- NHTSA Manufacturer Communication 11016352: 24U14, published March 13, 2025. It references loss of audio, an “Audio off” SYNC-screen message, and DTCs U1A00-87 and/or U0184-00. The supplied applicability associates this communication with the 2024 Ford Mustang Mach-E in the US.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Official sources supplied: NHTSA Manufacturer Communication 10109054 (SSM 46048): https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2015-2019.zip#nhtsa_id=10109054 ; NHTSA Manufacturer Communication 11016352 (24U14): https://static.nhtsa.gov/odi/tsbs/2025/MC-11016352-0001.pdf
- NHTSA: NHTSA Manufacturer Communication 10109054: SSM 46048 · official_tsb
- NHTSA: NHTSA Manufacturer Communication PDF 11016352: 24U14 · official_tsb
19. Frequently asked questions
What does Ford U1A00:87 mean?
A complete generic definition is not established by the supplied evidence. Official Ford communications associate U1A00:87 with the APIM/SYNC 3 on some 2016–2017 vehicles and with a possible audio-loss condition on the 2024 Mustang Mach-E communication.
Can U1A00:87 be present without symptoms?
Yes. SSM 46048 states that some 2016–2017 Ford and Lincoln vehicles with SYNC 3 may have U1A00:87 present in the APIM with no other customer-reported symptoms.
What should be done when U1A00:87 is present with no other symptoms on the applicable 2016–2017 SYNC 3 vehicles?
The verified communication instructs technicians to clear the DTCs and retest.
Does U1A00-87 affect backup and warning chimes on the 2024 Mustang Mach-E communication?
The supplied 24U14 evidence states that backup and warning chimes will continue to function normally.
Is U1A00-87 a recall?
Not yet established by verified evidence. The supplied sources are NHTSA manufacturer communications identified as official TSB evidence, not recall evidence.