# Service bulletin TSB 21\-2270

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10200745
- Published by NHTSA: 2021\-09\-02
- Manufacturer's number: TSB 21\-2270
- Manufacturer's date: 2021\-08\-16
- NHTSA component: POWER TRAIN; ELECTRICAL SYSTEM

## NHTSA's summary

Some 2020 Explorer/Aviator/Police Interceptor Utility vehicles equipped with all wheel drive \(AWD\) built on or before 20\-Mar\-2020 may exhibit various warning/fault messages with diagnostic trouble codes \(DTCs\) C0633 and/or C00A6:07 stored in the AWD module. This may be caused by an oil contaminated front halfshaft speed sensor. To correct the condition, follow the Service Procedure step to replace the front halfshaft speed sensor.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10200745-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10200745-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Transmission and driveline

## Trouble codes named

C00A6, C0633

## Vehicles listed

- 2020 FORD EXPLORER
- 2020 FORD EXPLORER POLICE INTERCEPT
- 2020 LINCOLN AVIATOR

## Recalls for the same vehicles and component

- [2026311](/recalls/tc/2026311.md), 2026-06-24: Powertrain
- [26V402000](/recalls/nhtsa/26V402000.md), 2026-06-24: POWER TRAIN:AUTOMATIC TRANSMISSION
- [2026005](/recalls/tc/2026005.md), 2026-01-09: Electrical
- [2025554](/recalls/tc/2025554.md), 2025-10-10: Electrical
- [25V349000](/recalls/nhtsa/25V349000.md), 2025-05-23: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [2025135](/recalls/tc/2025135.md), 2025-03-14: Powertrain
- [25V166000](/recalls/nhtsa/25V166000.md), 2025-03-14: POWER TRAIN:DRIVELINE:DRIVESHAFT
- [2023543](/recalls/tc/2023543.md), 2023-10-06: Powertrain
- [23V675000](/recalls/nhtsa/23V675000.md), 2023-10-06: POWER TRAIN:DRIVELINE:DRIVESHAFT
- [23V626000](/recalls/nhtsa/23V626000.md), 2023-09-08: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY

## Other bulletins for the same vehicles and component

- [TSB 26\-2325](/bulletins/11037978.md), 2026-10-05, Service bulletin: EXTERIOR LIGHTING; ELECTRICAL SYSTEM; UNKNOWN OR OTHER. Some of the vehicles listed in the Model statement above may exhibit a front courtesy lamp that is inoperative. This may be due to a concern with the front courtesy lamp light module.
- [TSB 26\-2395](/bulletins/11036595.md), 2026-09-01, Service bulletin: POWER TRAIN; UNKNOWN OR OTHER; ELECTRICAL SYSTEM. This article supersedes 26\-2287. Reason for update: update the labor operation numbers to add MT to operations C, F, G, H, J, K, L and M, and correct the part number LIMZ\-4A015\-B to L1MZ\-4A015\-B. Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: Harsh engagement Delayed engagement Harsh shift Delayed shift Illuminated malfunction indicator lamp \(MIL\) with diagnostic trouble codes \(DTC\)s P0751, P0752, P0756, P0757, P0761, P0762, P0766, P0767, P0771, P0772, P2700, P2701, P2702, P2703, P2704, P2705, P2707, P2708, P0729, P0731, P0732, P0733, P0734, P0735, P0736, P076F, P07D9, P07F6 and/or P07F7 stored in the powertrain control module \(PCM\) or transmission control module \(TCM\). This may be due to axial movement of the CDF clutch cylinder sleeve causing hydraulic circuit leaks. NOTE: If internal transmission service is required to address a concern detected with the CDF clutch cylinder following this article, technicians should carefully inspect and replace other transmission components and flush transmission fluid cooler only as ne
- [SSM 55069](/bulletins/11036103.md), 2026-08-11, Service bulletin: VISIBILITY/WIPER; ELECTRICAL SYSTEM; STRUCTURE:BODY. Some 2020\-2025 Explorer vehicles equipped with a power roof opening panel may exhibit a sunshield with localized bunching or binding/inoperative. This may be due to a broken or missing sunshield fabric retainer/clip. A revised sunshield clip \(LJ6Z\-5452118\-B\) is now available to address this condition. It is not necessary to replace the entire sunshield assembly if the clip\(s\) are broken or missing. Refer to Workshop Manual \(WSM\), Section 501\-17 Roof Opening Panel \> General Procedures \> Inspection and Replacement of the Roof Opening Panel Shield Clip.
- [SSM55059](/bulletins/11035556.md), 2026-08-03, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM; UNKNOWN OR OTHER; FUEL/PROPULSION SYSTEM. Some 2021\-2023 F\-150 vehicles equipped with a 3.5L PowerBoost engine, 2020\-2026 Explorer vehicles equipped with a 3.3L hybrid engine, and 2020\-2023 Lincoln Aviator vehicles equipped with a 3.0L EcoBoost hybrid engine may exhibit an illuminated powertrain malfunction \(wrench\) indicator with diagnostic trouble code \(DTC\) P0A1E stored in the powertrain control module \(PCM\). The vehicle may be unable to enter electric\-only drive modes as expected during normal drive cycles. This may be due to the belt integrated starter generator \(BISG\). For vehicles with this condition, follow the necessary Pinpoint Test in Workshop Manual \(WSM\), Section 303\-06 for DTC P0A1E and repair the vehicle as directed. Note that previous replacement of the BISG does not negate the need for subsequent BISG replacements if directed to do so by the appropriate Pinpoint Test diagnostics. Engineering is investigating this BISG quality concern. Monitor PTS for updates regarding this investigation.
- [TSB 26\-2287](/bulletins/11034011.md), 2026-06-22, Service bulletin: POWER TRAIN. This article supersedes 25\-2302. Reason for update: update the labor time allowance for F\-150 vehicles, update the Parts list to replace the part number W716979\-S439 with W721084\-S439, and add a note for LV fluids XT\-10\-QLVC and CXT\-10\-LV6 "Transfer Case Fluid". Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: Harsh engagement Delayed engagement Harsh shift Delayed shift Illuminated malfunction indicator lamp \(MIL\) with diagnostic trouble codes \(DTC\)s P0751, P0752, P0756, P0757, P0761, P0762, P0766, P0767, P0771, P0772, P2700, P2701, P2702, P2703, P2704, P2705, P2707, P2708, P0729, P0731, P0732, P0733, P0734, P0735, P0736, P076F, P07D9, P07F6 and/or P07F7 stored in the powertrain control module \(PCM\) or transmission control module \(TCM\). This may be due to axial movement of the CDF clutch cylinder sleeve causing hydraulic circuit leaks. NOTE: If internal transmission service is required to address a concern detected with the CDF clutch cylinder following this article, technicians should carefully inspect and replace other tra
- [SSM 54902](/bulletins/11033775.md), 2026-06-09, Service bulletin: POWER TRAIN. For 20202026 vehicles equipped with the 10R60 transmission, a new Transmission Clutch Circuit Leak Test has been introduced in the Ford Diagnosis and Repair System \(FDRS\). This test utilizes the pressure and vacuum transducer \(PVT\) when available. Workshop Manual \(WSM\) updates related to this diagnostic procedure are planned for release in Q4 2026. The new test improves the accuracy of detecting leaks within transmission fluid circuits and replaces the previous air check method. The previous air check procedure has been shown to produce a high rate of false positives, which may lead to unnecessary repairs when no actual leak is present. Accordingly, the air check procedure is not to be used for diagnosing internal transmission hydraulic leaks or as justification for transmission replacement.
- [SSM 54827](/bulletins/11032760.md), 2026-05-19, Service bulletin: POWER TRAIN. Some 2020\-2026 Explorer/Police Interceptor Utility/Aviator vehicles may require replacement of the front drive halfshaft inner/outer CV joint boot for various reasons. If Workshop Manual \(WSM\), Section 205\-04 \> Diagnosis and Testing leads to CV joint boot replacement, L1MZ\-3A331\-G \(Explorer/Police Interceptor Utility front inner/outer CV joint boot kit\), L1MZ\-3A331\-H \(Aviator front inner/outer CV joint boot kit\), L1MZ\-3A331\-F \(Explorer/Police Interceptor Utility front inner CV joint boot kit\) and L1MZ\-3A331\-E \(Aviator front inner CV joint boot kit\) have been released for service. Refer to WSM, Section 205\-04 for Removal and Installation procedures.
- [TSB 26\-2226](/bulletins/11032697.md), 2026-05-14, Service bulletin: POWER TRAIN. This bulletin supersedes 26\-2046. Reason For Update: update the parts list to change the claim quantity of the C clutch friction plates \(HL3Z\-7B164\-A\), C clutch steel plates \(HL3Z\-7B442\-F\), D clutch steel plates \(HL3Z\-7B442\-D\), add the rear driveshaft flange CV joint\-to\-pinion flange cup bolts and retaining straps \(LK4Z\-4B496\-B\) for Transit, and update the parts description for the transfer case fluids applicable for each vehicle line. Some of the vehicles listed in the Model statement above may exhibit all of the following conditions: \* Harsh engagement \* Delayed engagement \* Harsh shift \* Delayed shift \* Illuminated malfunction indicator lamp \(MIL\) with diagnostic trouble codes \(DTC\) P0751, P0752, P0756, P0757, P0761, P0762, P0766, P0767, P0771, P0772, P2700, P2701, P2702, P2703, P2704, P2705, P2707, P2708, P0729, P0731, P0732, P0733, P0734, P0735, P0736, P076F, P07D9, P07F6 and/or P07F7 stored in the powertrain control module \(PCM\) or transmission control module \(TCM\). This may be due to PCM software and/or axial movement of the CDF clutch cylinder \(7H351\) sleeve causing hydraulic circuit
- [SSM 54795](/bulletins/11032565.md), 2026-05-08, Service bulletin: ENGINE; ELECTRICAL SYSTEM; POWER TRAIN. Some 2021\-2023 F\-150 vehicles equipped with a 3.5L PowerBoost engine and 2020\-2026 Explorer vehicles equipped with a 3.3L hybrid engine may exhibit an illuminated powertrain malfunction \(wrench\) indicator with diagnostic trouble code \(DTC\) P0A1E stored in the powertrain control module \(PCM\). The vehicle may be unable to enter electric\-only drive modes as expected during normal drive cycles. This may be due to the software within the belt integrated starter generator \(BISG\). For vehicles with this condition, follow Pinpoint Test I: Battery Isolation/Voltage Stabilization Control Circuit Carry Outance located in the Workshop Manual \(WSM\), Section 303\-06D and repair the vehicle as necessary. Note that the BISG is on backorder status at the time of this publication and Ford is working to make parts available. Engineering is investigating this concern. Monitor PTS for updates.
- [23B64](/bulletins/11031780.md), 2026-04-30, Other: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. Customer Satisfaction Program 23B64 Certain 2020\-2024 Model Year Multiple Vehicle Lines Equipped with High Voltage Batteries Battery Energy Control Module \(BECM\) Software Update

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