Service bulletin A17-011

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	10134378
Published by NHTSA	2018-04-23
Manufacturer's number	A17-011
Manufacturer's date	2018-04-10
NHTSA component	ENGINE AND ENGINE COOLING; POWER TRAIN

NHTSA's summary

Service bulletin - Some 9-speed transmission warmers were improperly manufactured and allow the engine coolant and ATF to mix. If the fluids mix, the engine and transmission may be permanently damaged and require replacement. These vehicles previously had the transmission replaced because the transmission warmers leaked. In rare cases, these vehicles may have also overheated but because the issue was under investigation, a standard repair procedure hadn?t been developed. Further action is needed before the vehicle is completely repaired.

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, Transmission and driveline

Vehicles listed
HONDA PILOT	2016, 2017

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

Recalls for the same vehicles and component
23V751000	2023-11-13. ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL
2023603	2023-11-08. 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
A23-009	2025-07-09. Service bulletin. Service Bulletin - Under certain circumstances, after coming to a stop and engaging idle stop, the vehicle may not restart automatically due to excessive cylinder pressure and/or low cranking torque. Typically, the customer can immediately restart the vehicle by selecting Park and pressing the ENGINE START/STOP button.
A23-078	2025-06-05. Service bulletin. Service Bulletin - Torque converters may not have been manufactured to proper specifications. As a result, the torque converter lock-up clutch cannot provide adequate holding force due to pressure bleeding down through a crack in the lock-up piston. The reduced lock-up clutch capacity results in the transmission indicator flashing “D” and set DTC P0741 Torque Converter Clutch Performance or Stuck OFF.
A23-078	2025-04-29. Service bulletin. Service Bulletin - Torque converters may not have been manufactured to proper specifications. As a result, the lock-up clutch cannot provide adequate holding force due to pressure bleeding down through a crack in the lock-up piston. The reduced lock-up clutch capacity results in the transmission indicator flashing “D” and set the DTC P0741 Torque Converter Clutch Performance or Stuck OFF.
AEBM04182025901	2025-04-29. Other. Dealer Message - Torque converters may not have been manufactured to proper specifications. As a result, the torque converter lock-up clutch cannot provide adequate holding force due to pressure bleeding down through a crack in the lock-up piston. The reduced lock-up clutch capacity results in the MIL not illuminating. “D” flashes and “Transmission Overheat” message appears setting DTC P0741 Torque Converter Clutch Circuit Performance or Stuck OFF.
A16-013	2024-09-10. Service bulletin. Service Bulletin - Drivers may experience a chirping sound coming from the engine area with the engine warmed up due to the high pressure fuel pump is making a chirp.
A24-085	2024-07-26. Service bulletin. Service Bulletin - MIL flashes and vehicle will not accelerate, low power. After cycling the ignition, the symptom does not return with no stored DTCs. This issue is more common in regions with cold weather (specifically near or below freezing temperatures). Usually after a long drive (around 2 hours) and accelerating while cornering.
A24-085	2024-07-01. Service bulletin. Service Bulletin - The MIL flashes and vehicle will not accelerate, low power. After cycling the ignition, the symptom does not return with no stored DTCs. This issue is more common in regions with cold weather (specifically near or below freezing temperatures). Usually after a long drive (around 2 hours) and accelerating while cornering. Moisture accumulation in the intake manifold during long drives gets drawn into the combustion chamber while cornering, causing misfires.
A23-008	2023-11-29. Service bulletin. Service Bulletin - Under certain circumstances, after coming to a stop and the idle stop feature engages, the vehicle may not automatically restart. Typically, the customer can immediately restart the vehicle by selecting Park and pushing the ENGINE START/STOP button.
A23-078	2023-10-17. Service bulletin. Service Bulletin - Torque converters may not have been manufactured to proper specifications. As a result, the torque converter lock-up clutch cannot provide adequate holding force due to pressure bleeding down through a crack in the lock-up piston. The reduced lock-up clutch capacity results in DTC P0741 Torque Converter Clutch Circuit Performance or Stuck OFF.
A23-073	2023-09-13. Service bulletin. Service Bulletin - The vehicle's transmission temperature can become too hot due to automatic transmission fluid deterioration causing high foaming and low viscosity. During extended high load driving, the automatic transmission fluid will foam and cooler flow rate is reduced.