# Service bulletin SSM 52543

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: 11000295
- Published by NHTSA: 2024\-05\-23
- Manufacturer's number: SSM 52543
- Manufacturer's date: 2024\-05\-16
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

Some 2021\-2024 F\-150\-3.5L FHEV, 2020\-2024 Explorer 3.3L FHEV, 2020\-2024 Escape 2.5L FHEV, and 2022\-2024 Maverick 2.5L FHEV vehicles may exhibit an illuminated MIL with DTC P237F and/or P2C23 stored in the powertrain control module \(PCM\) and no affect on drivability. This may be due to seal damage, corrosion and/or water intrusion in the exhaust coolant temperature \(ECT\) sensors 3 and/or 4 connector. Visual inspection should be completed on ECT3 and ECT4 sensors and mating connections for seal damage, water intrusion, and corrosion. If seal damage, water intrusion or corrosion is present, repair per cell 5 of the Wiring Diagram, then apply Motorcraft® XG\-12 Electrical Grease to the female/vehicle side of the harness. This inspection of ECT3 and ECT4 sensors should be completed prior to starting the appropriate pinpoint test in Section 303\-03 of the Workshop Manual \(WSM\). If DTCs P237F and/or P2C23 do not return, no further action is necessary and the replacement of the entire exhaust heat exchanger assembly is not required. If P237F and/or P2C23 returns, follow the pinpoint test in Section 303\-03 of the WSM for further diagnostics.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11000295-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11000295-9999.pdf)

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

## Components

Electrical system

## Trouble codes named

P237F, P2C23

## Vehicles listed

- 2020 to 2024 FORD ESCAPE
- 2020 to 2024 FORD EXPLORER
- 2021 to 2024 FORD F\-150
- 2022 to 2024 FORD MAVERICK

## Recalls for the same vehicles and component

- [26V104000](/recalls/nhtsa/26V104000.md), 2026-02-20: EXTERIOR LIGHTING:TAIL LIGHTS; ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
- [26V091000](/recalls/nhtsa/26V091000.md), 2026-02-17: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [2026005](/recalls/tc/2026005.md), 2026-01-09: Electrical
- [25V789000](/recalls/nhtsa/25V789000.md), 2025-11-14: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [2025554](/recalls/tc/2025554.md), 2025-10-10: Electrical
- [25V343000](/recalls/nhtsa/25V343000.md), 2025-05-23: EQUIPMENT:ELECTRICAL:ENGINE BLOCK HEATER; ELECTRICAL SYSTEM
- [25V272000](/recalls/nhtsa/25V272000.md), 2025-04-23: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [2025139](/recalls/tc/2025139.md), 2025-03-14: Electrical
- [25V158000](/recalls/nhtsa/25V158000.md), 2025-03-14: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM
- [25V132000](/recalls/nhtsa/25V132000.md), 2025-02-28: ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL

## Other bulletins for the same vehicles and component

- [SSM 55221](/bulletins/11038438.md), 2026-10-12, Service bulletin: UNKNOWN OR OTHER; POWER TRAIN; ELECTRICAL SYSTEM. For 20222026 vehicles equipped with a 8F35 transmission, a revision to the Road Testing Vehicle procedure has been made in the WSM, Section 307\-01 \> Diagnosis and Testing. This updated procedure improves the diagnosis of customer reported transmission concerns and aids in locating the proper root cause. During diagnosis and testing, details regarding whether the condition is more prevalent when the vehicle is hot or cold, throttle percentage at the time of occurrence, vehicle speed, the specific shift involved, and whether the issue occurs during transmission engagements \(N\>R, N\>D, R\>D, and/or D\>R\) should be noted in the warranty claim. Engineering requests including these detailed operating conditions that will significantly assist with root cause analysis. Diagnosis, testing, and repair should use established labor times outside this article.
- [SSM 55215](/bulletins/11037783.md), 2026-10-02, Service bulletin: ELECTRICAL SYSTEM; SERVICE BRAKES; UNKNOWN OR OTHER. Some 2022\-2024 Maverick hybrid vehicles may exhibit various electrical symptoms and/or a no crank/no start condition related to an intermittent 12V battery drain that has discharged the 12V battery. This may be due to the software in the anti\-lock brake system \(ABS\) module. To correct this condition, download and run the "ABS \- Anti\-lock Brake System \(ABS\) Module Software Update" and "ACCM \- Air Conditioning Control Module \(ACCM\) Software Update" applications using the latest software level of the Ford Diagnosis and Repair System \(FDRS\) scan tool. For claiming use causal part 2005 and labor operations 10654C and 12651D along with MT2005SSM up to 0.7 hours for the ABS, ACCM, PCM, and SOBDMC as needed.
- [26B07](/bulletins/11037782.md), 2026-10-02, Other: FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; UNKNOWN OR OTHER; ELECTRICAL SYSTEM. Recommended Repair Prior to Sale Customer Satisfaction Program 26B07 Certain 2021\-2025 Model Year F\-150 Lightning and Mustang Mach\-E Vehicles Undesired Acceleration Due to Adaptive Cruise Control \(ACC\) Activation
- [TSB 26\-2428](/bulletins/11037776.md), 2026-10-02, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM; UNKNOWN OR OTHER; POWER TRAIN. This bulletin supersedes 25\-2326. Reason for update: update the service procedure to include the fuel tank isolation valve replacement, update the causal part number, and increase the labor time allowance to include the fuel tank isolation valve replacement. Some of the vehicles listed in the Model statement above may exhibit an illuminated malfunction indicator lamp \(MIL\) with diagnostic trouble code \(DTC\) P2450 stored in the powertrain control module \(PCM\). This may be due to the software in the PCM and/or the fuel tank isolation valve.
- [TSB 26\-2428](/bulletins/11037775.md), 2026-10-02, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM; POWER TRAIN; UNKNOWN OR OTHER. This bulletin supersedes 25\-2326. Reason for update: update the service procedure to include the fuel tank isolation valve replacement, update the causal part number, and increase the labor time allowance to include the fuel tank isolation valve replacement. Some of the vehicles listed in the Model statement above may exhibit an illuminated malfunction indicator lamp \(MIL\) with diagnostic trouble code \(DTC\) P2450 stored in the powertrain control module \(PCM\). This may be due to the software in the PCM and/or the fuel tank isolation valve.
- [SSM 55208](/bulletins/11037569.md), 2026-09-30, Service bulletin: UNKNOWN OR OTHER; ELECTRICAL SYSTEM. Some 2024\-2026 F\-150, 2025 Explorer/Aviator, 2025\-2026 Expedition/Navigator, or 2026 F\-Super Duty vehicles may exhibit diagnostic trouble code \(DTC\) U211B:43:48 stored in the body control module \(BCM\) when performing a Self\-Test. This DTC sets due to an internal BCM timing issue during the self\-test process. This specific code has no customer impact and does not cause any drivability concerns or warning messages. Clearing DTC U211B:43:48, reprogramming the BCM, or replacing the BCM is unlikely to prevent this DTC from setting. This DTC does not trigger a condition covered under warranty. Note: This guidance only applies to U211B with the specific failure byte 43 in status 48. Any other trusted real\-time operation network \(TRON\) DTCs or different failure bytes associated with U211B are still applicable and technicians must follow Workshop Manual \(WSM\) normal diagnostics for those DTCs.
- [SSM 55194](/bulletins/11037561.md), 2026-09-30, Service bulletin: ELECTRICAL SYSTEM; EXTERIOR LIGHTING; UNKNOWN OR OTHER. Some 2021\-2024 Mustang Mach\-E, 2025\-2026 Navigator and 2024 F\-150 vehicles may exhibit inoperative welcome/approach detection lights. This may be due to the body control module \(BCM\) software. To correct the condition, download and run the "BCM \- Programmable Module Installation \(PMI\)" application using the latest software level of the Ford Diagnosis and Repair System \(FDRS\) scan tool. If the condition persists after PMI, refer to Workshop Manual \(WSM\), Section 417\-01 for normal diagnostics and repair as necessary outside of this article. For claiming, use causal part 15604 and labor operations 12651D and BCM.
- [TCU\-26.2.12.2.2 Mach E, F](/bulletins/11037419.md), 2026-09-21, Over\-the\-air update: UNKNOWN OR OTHER; ELECTRICAL SYSTEM. Quality improvements include: \-Addresses a bug that may cause updates to fail
- [ECG\-26.2.12.3 F\-150LtMac](/bulletins/11037416.md), 2026-09-21, Over\-the\-air update: ELECTRICAL SYSTEM; UNKNOWN OR OTHER. Quality improvements include: \-ePrivacy enhancements
- [SSM 55157](/bulletins/11037313.md), 2026-09-15, Service bulletin: UNKNOWN OR OTHER; ELECTRICAL SYSTEM; ENGINE. Some 2022\-2024 Maverick Hybrid vehicles may exhibit an intermittent vibration and/or crunching noise after a cold start while the engine is running with the vehicle stationary in drive with no throttle input and brakes applied. An intermittent engine rocking or rolling motion in one direction may also be observed while the concern is present with the hood open.\<br /\>\<br /\> The noise may be present with no drivability concerns, relevant diagnostic trouble codes \(DTC\) stored, warning indicators illuminated and/or warning messages displayed. The noise may reduce or be eliminated after several minutes of driving when the powertrain warms up.\<br /\>\<br /\> This condition does not affect vehicle durability and no additional diagnosis or service is required for this condition at this time. Inform customers that they can continue to drive the vehicle and engineering is currently working on a solution for this condition that is expected in Q4 of 2026. Replacement of the engine or transmission will not resolve this condition. Monitor Professional Technician System \(PTS\) for additional information and schedule s

JSON: [/v1/bulletins/11000295](/v1/bulletins/11000295)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20SSM%2052543&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11000295&vehicle=Service%20bulletin%20SSM%2052543)