Service bulletin SSM 47911

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10159504
Published by NHTSA	2019-05-07
Manufacturer's number	SSM 47911
Manufacturer's date	2019-04-04
NHTSA component	ENGINE

NHTSA's summary

SSM 47911 - 2018-2019 F-150/Mustang - 5.0L - Chirping Noise From Engine Compartment At Idle Some 2018-2019 F-150 and Mustang vehicles equipped with a 5.0L engine may exhibit a chirping type noise from the upper right side of the engine at a warm or hot idle. This noise may sound similar to a front engine accessory drive (FEAD) chirp noise. If the noise persists with the FEAD belt removed and is isolated to the front cover area, this noise may be due to the primary timing chain tensioner. This noise will not result in any engine durability concerns. Do not attempt any repairs at this time. Engineering is investigating, monitor OASIS for updates.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
FORD F-150	2018, 2019
FORD MUSTANG	2018, 2019

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
19V278000	2019-04-08. ENGINE; EQUIPMENT:ELECTRICAL
18V894000	2018-12-18. ENGINE
2017515	2017-10-24. Engine
17V672000	2017-10-23. ENGINE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
TSB 24-2115	2024-05-04. Service bulletin. This article supersedes TSB 22-2260 to update the vehicle applications. Some 2018-2020 F-150 vehicles equipped with a 2.7L EcoBoost may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0420 and/or P0430 stored in the powertrain control module (PCM). This may be due to calibration and controls sensitivity.
SSM 52335	2024-03-20. Service bulletin. For 2015-2024 Ford and Lincoln vehicles equipped with turbocharged engines and customer concern of an engine oil leak, refer to Workshop Manual (WSM), Section 303-00 for oil leak inspection and testing methods. Ford has evaluated turbochargers replaced for oil leak symptoms and although oil may collect on the external surface of a turbocharger, it is extremely rare for a turbocharger assembly to be the root cause of the oil leak. Careful inspection of the turbocharger oil feed and drain tubes should be performed along with the recommended WSM procedures as needed. Warranty claims for turbocharger replacement going forward will be assessed.
SSM 52334	2024-03-20. Service bulletin. Some 2011-2024 Mustang and F-150 vehicles equipped with a 5.0L engine may exhibit a tick tap and/or typewriter ticking noise at idle after an engine oil change. It is often referred to as typewriter noise because of its similarity to the sound of a mechanical typewriter. The noise in question may be heard on some engines when engine temperatures reach 150°F (65°C) or higher and engine speed is at idle up to approximately 1700 RPM. It can typically be heard at the front wheel well and is often isolated to the transmission bell housing or oil pan area. The typewriter noise tick rate can be faster or slower and is not detrimental to the engine function or durability and has no short or long term effects on the engine. This an operating characteristic of the 5.0L engine and no repairs should be attempted. This information along with an example audio clip has been added to the WSM Section 303-00 Engine System General Information > Diagnosis and Testing > Engine > PPT F > Step F2.
TSB 23-2143	2023-05-31. Service bulletin. Some 2017-2020 F-150 and 2018-2020 Expedition/Navigator vehicles built on or before 30-Nov-2019 and equipped with a 3.5L EcoBoost engine may exhibit a ticking/tapping or rattle type noise from the top front cover area of the engine on initial start-up after a cold soak of 6 hours or more that may last for 2-5 seconds. Some vehicles may also exhibit an intermittent condition with no auto restart during auto-start-stop operation with or without diagnostic trouble code (DTC) P164C present in the powertrain control module (PCM). This may be due to a worn variable camshaft timing (VCT) unit. To correct the condition, follow the Service Procedure to replace the VCT units.
TSB 23-2132	2023-05-31. Service bulletin. Some 2018-2023 Mustang vehicles (non-Shelby GT-350) may exhibit various concerns with the active exhaust system. These may include Exhaust Mode Selection Not Available messages, and/or illuminated malfunction indicator lamp (MIL) with diagnostics trouble codes (DTCs) P26C5, P26C6, P26FE, P2BF9, P2BFB, P26C7, P2BF5, P2BF8, P2BFD and/or P2BFA. This may be due to an improperly seated exhaust system. To correct the condition, follow the Service Procedure to diagnose the tailpipe actuator.
SSM 51296	2023-01-31. Service bulletin. Some 2015-2020 F-150 vehicles equipped with a 2.7L, 3.5L or 5.0L engine may require replacement of the long block engine assembly. New service kits have been released which include all the one-time-use components required in the service procedure for removal and replacement of the long block engine assembly. Refer to the Ford Electronic Parts Catalog (ECAT) for long block service kit part number by application.
TSB 22-2373	2023-01-31. Service bulletin. Some 2018-2019 Mustang vehicles equipped with a 5.0L engine and a manual transmission may exhibit an inability to drive the vehicle in first and/or second gear. This may be due to a broken 1-2 shift fork. To correct the condition, follow the Service Procedure to replace the 1st/2nd shift fork, the mainshaft 2nd gear, and the 1st/2nd gear synchronizer hub and sleeve.
TSB 22-2372	2023-01-31. Service bulletin. Some 2018 Mustang vehicles equipped with a 5.0L engine and a manual transmission may exhibit an inability to engage third and fourth gear. This may be due to a broken 3-4 shift fork. To correct the condition, follow the Service Procedure to replace the 3rd/4th shift fork, the 1st/2nd shift fork, the countershaft 3rd gear, and the 3rd/4th gear synchronizer hub and sleeve.
TSB 22-2393	2022-11-01. Service bulletin. Some 2019-2021 F-150 vehicles built on or before 04-Mar-2021 and equipped with a 5.0L engine may experience an illuminated malfunction indicator lamp (MIL) and diagnostic trouble codes (DTC) P0171, P0172, P0174, P0175, P0364, P060B, P062B, P1104, P164C, P2601, P2BEC, P2BED, P2BEE, P2BEF, P2BF0, P2BF1, P2BF2 and/or P2BF3 stored in the powertrain control module (PCM). This may be due to various software parameters within the PCM. To correct the condition, follow the Service Procedure to reprogram the PCM and reset the keep alive memory (KAM).
TSB 22-2386	2022-11-01. Service bulletin. Some 2018-2021 F-150 vehicles equipped with the 3.0L diesel engine may experience low oil pressure at idle after an oil change. This condition may be caused by a broken anti-drain back oil plug in the oil filter adapter. The anti-drain back oil plug is now available to be serviced separately from the oil filter adapter. To correct this condition, follow this service procedure to replace the anti-drain back oil plug.