Ford P0AA5
10C666-C 1 H
Quick answer
For US-market 2021–2022 Ford Mustang Mach-E vehicles, DTC P0AA5 is listed in Ford TSB 24-2017 as a possible code associated with an illuminated malfunction indicator lamp (MIL) and/or powertrain malfunction (wrench) indicator. The supplied evidence does not establish the code’s plain-language definition beyond the source wording, “10C666-C 1 H.”
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
Watch Videos
Relevant videos play here without leaving this diagnostic page.
No sufficiently relevant embeddable video has been accepted for this diagnostic yet.
Videos are supporting material and never override OEM or regulator evidence.
1. What does P0AA5 mean?
For US-market 2021–2022 Ford Mustang Mach-E vehicles, DTC P0AA5 is listed in Ford TSB 24-2017 as a possible code associated with an illuminated malfunction indicator lamp (MIL) and/or powertrain malfunction (wrench) indicator. The supplied evidence does not establish the code’s plain-language definition beyond the source wording, “10C666-C 1 H.”
2. Technical explanation
Ford’s supplied diagnostic record identifies P0AA5 as a DTC and gives the canonical title/meaning as “10C666-C 1 H.” NHTSA-hosted Ford TSB 24-2017 lists P0AA5 among several DTCs that may be present with an illuminated MIL and/or powertrain malfunction (wrench) indicator. The evidence summary also references BECM and service part LK9Z-10C666-C, quantity 1. A specific failure mechanism, diagnostic threshold, and component-level root cause for P0AA5 are not yet established by verified evidence.
3. What system is affected?
Not yet established by verified evidence. The TSB evidence references the BECM, but does not establish the exact system or component implicated by P0AA5.
4. How serious is this code?
Unknown. The supplied diagnostic record marks severity as unknown.
5. Symptoms you may notice
- Illuminated malfunction indicator lamp (MIL).
- Illuminated powertrain malfunction (wrench) indicator.
6. Possible causes
- Not yet established by verified evidence. The supplied TSB evidence lists P0AA5 with other DTCs and references BECM/service part LK9Z-10C666-C, but does not establish a root cause in the provided material.
7. Can I still drive the vehicle?
Unknown. The supplied diagnostic record marks safe-to-drive status as unknown.
8. Can I charge the vehicle?
Unknown. The supplied diagnostic record marks safe-to-charge status as unknown.
9. What you can safely do
- Record all displayed warning indicators and stored diagnostic trouble codes.
- Arrange diagnosis by a Ford dealer or qualified EV service facility.
- Do not attempt high-voltage battery, BECM, or related electrical repairs yourself.
10. Step-by-step troubleshooting
- Have a service facility retrieve and document all stored DTCs, including any codes present with P0AA5.
- Provide the vehicle year, model, market, warning indicators, and DTC list when requesting service.
- Ask the servicing dealer to determine whether Ford TSB 24-2017 applies to the vehicle.
11. When to contact service
Service is recommended because P0AA5 is included in Ford TSB 24-2017 for certain 2021–2022 US Mustang Mach-E vehicles with MIL and/or wrench warnings. The supplied record does not establish that service is mandatory in every case.
12. What the service center may check
- Confirm vehicle applicability: Ford Mustang Mach-E, model years 2021–2022, US market.
- Check for an illuminated MIL and/or powertrain malfunction (wrench) indicator.
- Retrieve stored DTCs and determine whether P0AA5 is present with any other listed codes.
- Review Ford TSB 24-2017 and follow its official diagnostic and repair procedure if applicable.
13. Possible repair or resolution
- Not yet established by verified evidence. The evidence summary references BECM and part LK9Z-10C666-C, quantity 1, but does not provide enough verified detail to state the required repair or confirm that this part resolves every P0AA5 occurrence.
14. Affected vehicles
- Ford Mustang Mach-E · 2021–2022 · US
15. Related TSBs / service bulletins
- Ford TSB 24-2017, published January 26, 2024 and hosted by NHTSA as Manufacturer Communication PDF 10249760. It applies, per supplied applicability data, to US 2021–2022 Ford Mustang Mach-E vehicles. The evidence summary lists P0AA5 among DTCs associated with an illuminated MIL and/or powertrain malfunction (wrench) indicator and references BECM/service part LK9Z-10C666-C.
16. Recall information
- Not yet established by verified evidence. No recall information was supplied.
17. Official manufacturer information
Official source: NHTSA Manufacturer Communication PDF 10249760, Ford TSB 24-2017: https://static.nhtsa.gov/odi/tsbs/2024/MC-10249760-0001.pdf
19. Frequently asked questions
What does P0AA5 mean on a Ford Mustang Mach-E?
The supplied Ford diagnostic record gives the canonical meaning as “10C666-C 1 H.” A clearer technical definition is not yet established by verified evidence.
Which vehicles are covered by the supplied evidence?
The supplied applicability data identifies US-market 2021–2022 Ford Mustang Mach-E vehicles.
What warnings may occur with P0AA5?
Ford TSB 24-2017 lists P0AA5 with an illuminated MIL and/or powertrain malfunction (wrench) indicator.
Is it safe to drive or charge with P0AA5?
Not yet established by verified evidence. The supplied diagnostic record marks both safe-to-drive and safe-to-charge status as unknown.
Is there a Ford service bulletin for P0AA5?
Yes. Ford TSB 24-2017 lists P0AA5 among the applicable DTCs in the supplied NHTSA-hosted evidence.