NHTSA ID Number: 10201908
Manufacturer Communication Number: TSB 21-2338
Summary
Some 2021 F-150 vehicles equipped with a 3.5L PowerBoost engine may exhibit an illuminated malfunction indicator lamp (MIL) and diagnostic trouble codes (DTCs) P0A1A:06 and/or P1A0E:64 stored in the secondary on board diagnostic control module C (SOBDMC), also referred to as the inverter system controller (ISC). These DTCs may be set due to an issue related to electric motor performance. To correct the condition, follow the Service Procedure steps to identify a concern with the hybrid drive unit.
This bulletin supersedes 21-2072. Reason for update: Incorrect or Incomplete Symptom
Model:
2021 F-150
Engine: 3.5L PowerBoost
Summary
This article supersedes TSB 21-2072 to update the Issue and Action statements.
Issue: Some 2021 F-150 vehicles equipped with a 3.5L PowerBoost engine may exhibit an illuminated malfunction indicator lamp (MIL) and diagnostic trouble codes (DTCs) P0A1A:06 and/or P1A0E:64 stored in the secondary on board diagnostic control module C (SOBDMC), also referred to as the inverter system controller (ISC). These DTCs may be set due to an issue related to electric motor performance. To correct the condition, follow the Service Procedure steps to identify a concern with the hybrid drive unit.
Action: Follow the Service Procedure steps to correct the condition on vehicles that meet all of the following criteria:
- 2021 F-150
- 3.5L PowerBoost engine
- Illuminate MIL with DTCs P0A1A:06 and/or P1A0E:64
NOTE: Part quantity refers to the number of that service part number required, which may be different than the number of individual pieces. Service part numbers contain 1 piece unless otherwise stated. “As Needed” indicates the part is required but the number may vary or is not a whole number; parts can be billed out as non-whole numbers, including less than 1. “If Needed” indicates the part is not mandatory.
Parts
| Service Part Number | Quantity | Description | |
| ML3Z-7P209-A | 1 | Hybrid Drive Unit | – |
| N800594-S100 No products found. | 1 Or 2 | Driveshaft Bolt | Package Contains 4 Pieces, 4 Pieces Required for Rear Yoke, 4 Pieces Required If The Vehicle Has A 4 Bolt Transmission Yoke |
W715579-S439 | 1 | Center Bearing Support Bolt (2-Piece Driveshaft) | – |
| W520113-S440
Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API | 1 | Stabilizer Bar Bracket Nuts | Package Contains 4 Pieces, 4 Pieces Required |
7L1Z-4B496-C
Genuine Ford 7L1Z-4B496-C Bolt
Last update on 2026-06-18 / Affiliate links / Images from Amazon Product Advertising API | 2 | Front Driveshaft Flange Cup Bolts (4×4 Only) | Package Contains 1 Piece, 2 Pieces Required |
| W718926-S900 | 1 | Support Insulator Bolts (4×4 Only) | Package Contains 4 Pieces, 4 Pieces Required |
| W500120-S439 | 1 | Support Insulator Bolts (4×2 Only) | Package Contains 4 Pieces, 4 Pieces Required |
| W520114-S442 | 1 | Cross Member Nuts | Package Contains 4 Pieces, 4 Pieces Required |
| W714418-S439 No products found. | 1 | Cross Member Bolts | Package Contains 4 Pieces, 4 Pieces Required |
W709771-S440
Ford W709771-S440 Nut Adjust Screw
Last update on 2026-06-18 / Affiliate links / Images from Amazon Product Advertising API | 2 | Transmission Mount Nuts | Package Contains 1 Piece, 2 Pieces Required |
| W520514-S440 No products found. | 4 | Catalyst/Manifold Nut | Package Contains 1 Piece, 4 Pieces Required |
| ML3Z-5C226-A | 2 | Exhaust Gasket | Package Contains 1 Piece, 2 Pieces Required |
| ML3Z-6775-K | 1 | Heat Shield | – |
| W704980-S439 | 1 | Shift Cable Bracket Bolt | Package Contains 4 Pieces, 1 Piece Required |
| W716375-S900 | 2 | Transfer Case Bolts (4×4 only) | Package Contains 5 Pieces, 9 Pieces Required |
VC-13-G
Ford Genuine Fluid VC-13-G Yellow Concentrated Antifreeze/Coolant - 1 Gallon
Last update on 2026-06-18 / Affiliate links / Images from Amazon Product Advertising API | As Needed | Motorcraft® Yellow Concentrated Antifreeze/Coolant (All Markets Except Canada) | – |
| CVC-13-G | As Needed | Motorcraft® Yellow Concentrated Antifreeze/Coolant (Canada Only) | – |
XT-12-QULV
MOTORCRAFT Mercon Ultra Low Viscosity Fluid Automatic Transmission Fluid for 2017 F-150, Black
Last update on 2026-06-12 / Affiliate links / Images from Amazon Product Advertising API | As Needed | Motorcraft® MERCON® ULV Automatic Transmission Fluid | – |
XL-5-A
Motorcraft XL5# Grease - Long Life Lubricating ()
Last update on 2026-06-12 / Affiliate links / Images from Amazon Product Advertising API | As Needed | Motorcraft® Multi-Purpose Grease Spray | – |
| Parts To Inspect And Replace Only If Necessary | |||
| ML3Z-7A191-A | If Needed | Hybrid Drive Unit Gasket | – |
| ML3Z-7869-C | If Needed | Transmission Cooler (Only To Be Used If O-rings Are Not Available) | – |
| ML3Z-3B478-B | If Needed | Slip Yoke Boot Clamp (4×4 Only) | – |
| ML3Z-4421-A | If Needed | Front Driveshaft Boot | – |
| L1MZ-7G084-A | If Needed | Transmission Fluid Spray Nozzle | – |
| L1MZ-7A010-A | If Needed | Plug | – |
| W718758-S300 | If Needed | Dowel | Package Contains 4 Pieces, Max 2 Pieces Necessary |
Service Procedure
1. Road test the vehicle under load above 4000 revolutions per minute (RPM) while monitoring SOBDMC parameter identifications (PIDs) GTQ_CMD and GTQ_OUT.
2. Are the GTQ_CMD and GTQ_OUT readings separated by greater than 25 Nm (20 lb-ft)?
(1). Yes – replace the hybrid drive unit. Refer to the Workshop Manual (WSM), Section 303-01G.
NOTE: If a new hybrid drive unit was installed, the Transmission Identification (TRID) file must be updated with characterization data for the new hybrid drive unit. Locate the hybrid drive unit 2D barcode located near the input shaft. Scan the 2D barcode on the new hybrid drive unit using a QR or 2D barcode reader app. Record the last 7 digits of the barcode. This TRID information must be obtained before the transmission is installed back into the vehicle.
(2). No – this article does not apply. Refer to the WSM, Section 303-14G, for normal diagnostics.
1 Affected Product
Vehicle
| MAKE | MODEL | YEAR |
| FORD | F-150 | 2021 |
1 Associated Document
Manufacturer Communications
21-2338
28 September 2021
NHTSA ID Number: 10194429
Manufacturer Communication Number: TSB 21-2072
Summary
Some 2021 F-150 vehicles equipped with a 3.5L PowerBoost engine may exhibit an illuminated malfunction indicator lamp (MIL) and diagnostic trouble codes (DTCs) P0A1A and/or P1A0E stored in the secondary on board diagnostic control module C (SOBDMC), also referred to as the inverter system controller (ISC). These DTCs may be set due to an issue related to electric motor performance. To correct the condition, follow the Service Procedure steps to identify a concern with the hybrid drive unit.
1 Associated Document
Manufacturer Communications
21-2072
10 May 2021
MC-10194429-0001.pdf 103.341KB
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Warranty Status: Eligible under provisions of New Vehicle Limited Warranty (NVLW)/Emissions Warranty/Service Part Warranty (SPW)/Special Service Part (SSP)/Extended Service Plan (ESP) coverage. Limits/policies/prior approvals are not altered by a TSB. NVLW/Emissions Warranty/SPW/SSP/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool. Labor Times Description Operation No. Time 2021 F-150 4X2 3.5L PowerBoost: Retrieve DTCs, Test And Replace The Hybrid Drive Unit (Do Not Use With Any Other Labor Operations) 212338A 7.9 Hrs. 2021 F-150 4X4 3.5L PowerBoost: Retrieve DTCs, Test And Replace The Hybrid Drive Unit (Do Not Use With Any Other Labor Operations) 212338B 8.8 Hrs. Repair/Claim Coding Causal Part: 7P209 Condition Code: 42
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