Service bulletin F0A_Dealer Lette

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	10134390
Published by NHTSA	2018-04-23
Manufacturer's number	F0A_Dealer Lette
Manufacturer's date	2016-04-07
NHTSA component	FUEL SYSTEM, GASOLINE

NHTSA's summary

Dealer Letter: In our continuing efforts to ensure the best in customer satisfaction, Toyota has turned Limited Service Campaign (LSC) F0A into Special Service Campaign (SSC) F0A with no expiration date. This SSC covers certain 2012 ? 2014 MY Tundra and Sequoia vehicles. This SSC will cover approximately 39,000 Sequoia and 247,000 Tundra vehicles equipped with a 5.7 liter gasoline or 5.7 Liter-Flex Fuel engines. In certain 2012 ? 2014 Model Year Toyota Tundra and Sequoia vehicles equipped with a 5.7 Liter gasoline or 5.7 Liter-Flex Fuel engines, the Engine Control Module (ECM) may set a Diagnostic Trouble Code (DTC) if debris/ice becomes lodged in the air switching valve. If this occurs, the Malfunction Indicator (Check Engine) Light could illuminate and the vehicle could enter a ?Fail-Safe? Mode (also known as ?Limp-Home? Mode). If this occurs the vehicle?s power and speed will be reduced, which could inconvenience you and require immediate repair.

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

Fuel system

Vehicles listed
TOYOTA SEQUOIA	2012, 2013, 2014
TOYOTA TUNDRA	2012, 2013, 2014

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

Other bulletins for the same vehicles and component
T-TT-0294-14 Rev	2018-04-23. Service bulletin. TT: Greenhouse Gas Logic (GHC) has been implemented on Toyota A/C Systems to reduce tailpipe emissions. The federal government issues café (Corporate Average Fuel Economy) credits to vehicle manufacturers that implement new technologies that reduce the carbon footprint of the vehicles they produce. GHC Logic technology works by automatically operating the HVAC system in REC mode when certain operating conditions are met, improving the A/C systems cooling efficiency and reducing the vehicle's C02 emissions.
T-TT-0294-14	2018-04-02. Service bulletin. Tech Tip: Greenhouse Gas Logic (GHG) has been implemented on Toyota A/C Systems to reduce tailpipe emissions. The Federal government issues CAFÉ (Corporate Average Fuel Economy) credits to vehicle manufacturers that implement new technologies that reduce the carbon footprint of the vehicles they produce. GHG Logic technology works by automatically operating the HVAC system in REC mode when certain conditions are met, improving the A/C system cooling efficiency and reducing the vehicle's CO2 tailpipe emissions.
LSC ECM D0E TI U	2018-04-02. Service bulletin. In certain 2012-2013 Model Year Toyota Tundra and Sequoia vehicles equipped with a 5.7 liter gasoline or Flex Fuel engines, the ECM calibration may cause an emissions control component called an Air Injection Pump to fail under certain driving conditions.
F0A_LSC_Dealer D	2017-08-14. Service bulletin. Dealer Daily: In our continuing effort to ensure the best in customer satisfaction, Toyota is launching a Limited Service Campaign (LSC) on certain 2012 - 2014 MY Tundra and Sequoia vehicles. This LSC will cover approximately 39,000 Sequoia and 247,000 Tundra vehicles equipped with a 5.7 liter gasoline or 5.7 Liter-Flex Fuel engines.
D0E_LSC_Technica	2017-08-14. Service bulletin. Technical Instructions: In certain 2012 - 2013 Model Year Toyota Tundra and Sequoia vehicles equipped with a 5.7 Liter gasoline or 5.7 Liter-Flex Fuel engines, the Engine Control Module (ECM) calibration may cause an emissions control component called an Air Injection Pump to fail under certain driving conditions. If this occurs, the vehicle could enter a "Fail-Safe" Mode (also known as "Limp-Home" Mode). This mode reduces the vehicle's power and speed, which could inconvenience you and require immediate repair.
F0A_LSC_Dealer L	2017-08-14. Service bulletin. Dealer Letter: In certain 2012 - 2014 Model Year Toyota Tundra and Sequoia vehicles equipped with a 5.7 Liter gasoline or 5.7 Liter-Flex Fuel engines, the Engine Control Module (ECM) may set a Diagnostic Trouble Code (DTC) if debris/ice becomes lodged in the air switching valve. If this occurs, the Malfunction Indicator (Check Engine) Light could illuminate and the vehicle could enter a "Fail-Safe" Mode (also known as "Limp-Home" Mode). If this occurs the vehicle's power and speed will be reduced, which could inconvenience you and require immediate repair.
F0A_LSC_Region L	2017-08-14. Service bulletin. Region Letter: In certain 2012 - 2014 Model Year Toyota Tundra and Sequoia vehicles equipped with a 5.7 Liter gasoline or 5.7 Liter-Flex Fuel engines, the Engine Control Module (ECM) may set a Diagnostic Trouble Code (DTC) if debris/ice becomes lodged in the air switching valve. If this occurs, the Malfunction Indicator (Check Engine) Light could illuminate and the vehicle could enter a "Fail-Safe" Mode (also known as "Limp-Home" Mode). If this occurs the vehicle's power and speed will be reduced, which could inconvenience you and require immediate repair.
F0A_LSC_Dealer D	2017-08-14. Service bulletin. Dealer Daily: In our continuing effort to ensure the best in customer satisfaction, Toyota is launching a Limited Service Campaign (LSC) on certain 2012 - 2014 MY Tundra and Sequoia vehicles. This LSC will cover approximately 39,000 Sequoia and 247,000 Tundra vehicles equipped with a 5.7 liter gasoline or 5.7 Liter-Flex Fuel engines.